Denial of Service
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
How It Works
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions. Attackers exploit asymmetry: minimal attacker effort produces disproportionate resource consumption on the target. Application-level attacks use specially crafted inputs that trigger expensive operations—a regex engine processing malicious patterns can backtrack exponentially, or XML parsers recursively expand entities until memory exhausts. Network-level attacks flood targets with connection requests or amplify traffic through reflection, but application vulnerabilities often provide the most efficient attack surface.
The attack typically begins with reconnaissance to identify resource-intensive operations or unprotected endpoints. For algorithmic complexity attacks, adversaries craft inputs hitting worst-case performance—hash collision inputs filling hash tables with collisions, deeply nested JSON triggering recursive parsing, or pathological regex patterns like (a+)+b against strings of repeated 'a' characters. Resource exhaustion attacks open thousands of connections, upload massive files to unbounded storage, or trigger memory leaks through repeated operations. Crash-based attacks target error handling gaps: null pointer dereferences, unhandled exceptions in parsers, or assertion failures that terminate processes.
Impact
- Service unavailability preventing legitimate users from accessing applications during attack duration
- Revenue loss from downtime in e-commerce, SaaS platforms, or transaction processing systems
- Cascading failures as resource exhaustion spreads to dependent services or database connections pool out
- SLA violations triggering financial penalties and damaging customer trust
- Security team distraction providing cover for data exfiltration or intrusion attempts running concurrently
Real-World Examples
CVE-2018-1000544 in Ruby's WEBrick server allowed ReDoS through malicious HTTP headers containing specially crafted patterns that caused the regex engine to backtrack exponentially, freezing request processing threads. A single attacker could saturate all available workers.
Cloudflare experienced a global outage in 2019 when a single WAF rule containing an unoptimized regex hit pathological cases on legitimate traffic spikes. The .*(?:.*=.*)* pattern exhibited catastrophic backtracking, consuming CPU cycles across their edge network until the rule was disabled.
CVE-2013-1664 demonstrated XML bomb vulnerabilities in Python's XML libraries. Attackers uploaded XML documents with nested entity definitions-each entity expanding to ten copies of the previous level. A 1KB upload could expand to gigabytes in memory during parsing, crashing applications instantly.
Mitigation
- Strict input validation enforcing size limits, complexity bounds, and nesting depth restrictions before processing
- Request rate limiting per IP address, API key, or user session with exponential backoff
- Timeout enforcement terminating operations exceeding reasonable execution windows (typically 1-5 seconds)
- Resource quotas limiting memory allocation, CPU time, and connection counts per request or tenant
- Regex complexity analysis using linear-time algorithms or sanitizing patterns to eliminate backtracking
- Circuit breakers automatically rejecting requests when error rates or latency thresholds indicate degradation
- Load balancing and autoscaling distributing traffic across instances with automatic capacity expansion
Recent CVEs (40242)
A missing input sanitization flaw was found in the implementation of LDP database used for the LDAP server. Rated medium severity (CVSS 6.5), this vulnerability is no authentication required, low attack complexity.
An issue was discovered in the HDF HDF5 1.10.2 library. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. Rated high severity (CVSS 7.0). No vendor patch available.
In ImageMagick 7.0.8-11 Q16, a tiny input file 0x50 0x36 0x36 0x36 0x36 0x4c 0x36 0x38 0x36 0x36 0x36 0x36 0x36 0x36 0x1f 0x35 0x50 0x00 can result in a hang of several minutes during which CPU and. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Dave Gamble cJSON version 1.7.3 and earlier contains a CWE-416: Use After Free vulnerability in cJSON library that can result in Possible crash, corruption of data or even RCE. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Dave Gamble cJSON version 1.7.2 and earlier contains a CWE-415: Double Free vulnerability in cJSON library that can result in Possible crash or RCE. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Dave Gamble cJSON version 1.7.6 and earlier contains a CWE-772 vulnerability in cJSON library that can result in Denial of Service (DoS). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Jsish version 2.4.65 contains a CWE-476: NULL Pointer Dereference vulnerability in Function jsi_ValueCopyMove from jsiValue.c:240 that can result in Crash due to segmentation fault. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
JabRef version <=4.3.1 contains a XML External Entity (XXE) vulnerability in MsBibImporter XML Parser that can result in disclosure of confidential data, denial of service, server side request. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Stroom version <5.4.5 contains a XML External Entity (XXE) vulnerability in XML Parser that can result in disclosure of confidential data, denial of service, server side request forgery, port. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
LibreHealthIO lh-ehr version REL-2.0.0 contains a Authenticated Unrestricted File Deletion vulnerability in Import template that can result in Denial of service. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Eclipse RDF4j version < 2.4.0 Milestone 2 contains a XML External Entity (XXE) vulnerability in RDF4j XML parser parsing RDF files that can result in the disclosure of confidential data, denial of. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
OpenCart-Overclocked version <=1.11.1 contains a Cross Site Scripting (XSS) vulnerability in User input entered unsanitised within JS function in the template that can result in Unauthorised actions. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
zutils version prior to version 1.8-pre2 contains a Buffer Overflow vulnerability in zcat that can result in Potential denial of service or arbitrary code execution. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
JerryScript version Tested on commit f86d7459d195c8ba58479d1861b0cc726c8b3793. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
The Symantec Encryption Management Server (SEMS) product, prior to version 3.4.2 MP1, may be susceptible to a denial of service (DoS) exploit. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c in the Linux kernel through 4.18.1, as used in Xen through 4.11.x and other products. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Xen through 4.11.x. Rated medium severity (CVSS 6.5), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Xen through 4.11.x. Rated medium severity (CVSS 6.5), this vulnerability is low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
An issue was discovered in Xen through 4.11.x. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. No vendor patch available.
A Buffer Overflow exploited through web interface by remote attacker can cause denial of service in Kraftway 24F2XG Router firmware 3.5.30.1118. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An attacker with low privileges can cause denial of service in Kraftway 24F2XG Router firmware version 3.5.30.1118. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Denial of service via crafting malicious link and sending it to a privileged user can cause Denial of Service in Kraftway 24F2XG Router firmware version 3.5.30.1118. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
When reading a specially crafted ZIP archive, the read method of Apache Commons Compress 1.7 to 1.17's ZipArchiveInputStream can fail to return the correct EOF indication after the end of the stream. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
A vulnerability in the Local Packet Transport Services (LPTS) feature set of Cisco ASR 9000 Series Aggregation Services Router Software could allow an unauthenticated, remote attacker to cause a. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability in the implementation of Extensible Authentication Protocol over LAN (EAPOL) functionality in Cisco Small Business 100 Series Wireless Access Points and Cisco Small Business 300. Rated medium severity (CVSS 6.8), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliances could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM & Presence Service (CUCM IM&P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The daemon in GDM through 3.29.1 does not properly unexport display objects from its D-Bus interface when they are destroyed, which allows a local attacker to trigger a use-after-free via a specially. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
A security vulnerability in HPE Integrated Lights-Out 3 prior to v1.90, iLO 4 prior to v2.60, iLO 5 prior to v1.30, Moonshot Chassis Manager firmware prior to v1.58, and Moonshot Component Pack prior. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An uncontrolled resource consumption flaw has been discovered in redhat-certification in the way documents are loaded. Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Dell EMC Data Protection Advisor, versions 6.2, 6,3, 6.4, 6.5 and Dell EMC Integrated Data Protection Appliance (IDPA) versions 2.0, 2.1 contain a XML External Entity (XXE) Injection vulnerability in. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
PHP Scripts Mall hotel-booking-script 2.0.4 allows remote attackers to cause a denial of service via crafted JavaScript code in the First Name, Last Name, or Address field. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
ASUS HG100 devices allow denial of service via an IPv4 packet flood. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
PHP Scripts Mall advanced-real-estate-script 4.0.9 allows remote attackers to cause a denial of service (page structure loss) via crafted JavaScript code in the Name field of a profile. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
PHP Scripts Mall Naukri / Shine / Jobsite Clone Script 3.0.4 allows remote attackers to cause a denial of service (page update outage) via crafted PHP and JavaScript code in the "Current Position". Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Stack-based buffer overflow in the Cisco Thor decoder before commit 18de8f9f0762c3a542b1122589edb8af859d9813 allows local users to cause a denial of service (segmentation fault) and execute arbitrary. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
JioFi 4G Hotspot M2S devices allow attackers to cause a denial of service (secure configuration outage) via an XSS payload in the SSID name and Security Key fields. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
It was found that vdsm before version 4.20.37 invokes qemu-img on untrusted inputs without limiting resources. Rated medium severity (CVSS 6.3), this vulnerability is no authentication required, low attack complexity.
One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
ChopUpSingleUncompressedStrip in tif_dirread.c in LibTIFF 4.0.9 allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
XnView 2.45 allows remote attackers to cause a denial of service (User Mode Write AV starting at MSVCR120!memcpy+0x0000000000000074 and application crash) or possibly have unspecified other impact. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
XnView 2.45 allows remote attackers to cause a denial of service (User Mode Write AV starting at Qt5Core!QVariant::~QVariant+0x0000000000000014 and application crash) or possibly have unspecified. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
XnView 2.45 allows remote attackers to cause a denial of service (Read Access Violation at the Instruction Pointer and application crash) or possibly have unspecified other impact via a crafted ICO. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Nmap through 7.70, when the -sV option is used, allows remote attackers to cause a denial of service (stack consumption and application crash) via a crafted TCP-based service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
The doPayouts() function of the smart contract implementation for MegaCryptoPolis, an Ethereum game, has a Denial of Service vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PHPCMS 9 allows remote attackers to cause a denial of service (resource consumption) via large font_size, height, and width parameters in an api.php?op=checkcode request. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The get_app_path function in desktop/unx/source/start.c in LibreOffice through 6.0.5 mishandles the realpath function in certain environments such as FreeBSD libc, which might allow attackers to. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in wifipcap/wifipcap.cpp in TCPFLOW through 1.5.0-alpha. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
OCS Inventory 2.4.1 lacks a proper XML parsing configuration, allowing the use of external entities. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in PHP 7.0.x before 7.0.27, 7.1.x before 7.1.13, and 7.2.x before 7.2.1. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An exploitable permanent denial of service vulnerability exists in Insteon Hub running firmware version 1013. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
exif_process_IFD_in_MAKERNOTE in ext/exif/exif.c in PHP before 5.6.37, 7.0.x before 7.0.31, 7.1.x before 7.1.20, and 7.2.x before 7.2.8 allows remote attackers to cause a denial of service. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.
An input validation flaw exists in ttembed. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability in Cisco AMP for Endpoints Mac Connector Software installed on Apple macOS 10.12 could allow an unauthenticated, remote attacker to cause a kernel panic on an affected system,. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required.
A vulnerability in the password change function of Cisco Prime Collaboration Provisioning could allow an authenticated, remote attacker to cause the system to become inoperable. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
tss_alloc in sys/arch/i386/i386/gdt.c in OpenBSD 6.2 and 6.3 has a Local Denial of Service (system crash) due to incorrect I/O port access control on the i386 architecture. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
Martem TELEM GW6 and GWM devices with firmware 2018.04.18-linux_4-01-601cb47 and prior allow the creation of new connections to one or more IOAs, without closing them properly, which may cause a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
HUAWEI Mate 10 smartphones with versions earlier than ALP-AL00 8.1.0.311 have a use after free vulnerability on mediaserver component. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Mdapt Driver of Huawei MediaPad M3 BTV-W09C128B353CUSTC128D001; Mate 9 Pro versions earlier than 8.0.0.356(C00); P10 Plus versions earlier than 8.0.0.357(C00) has a buffer overflow vulnerability. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Some Huawei mobile phone with the versions before BLA-L29 8.0.0.145(C432) have a denial of service (DoS) vulnerability because they do not adapt to specific screen gestures. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with a double "To" header and an empty "To" tag causes a segmentation fault and crash. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A flaw was found in the Linux kernel's ext4 filesystem. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This Out-of-bounds Write vulnerability could allow attackers to write data beyond allocated buffer boundaries leading to code execution or crashes.
An issue was discovered in libpbc.a in cloudwu PBC through 2017-03-02. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
drivers/infiniband/core/ucma.c in the Linux kernel through 4.17.11 allows ucma_leave_multicast to access a certain data structure after a cleanup step in ucma_process_join, which allows attackers to. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
A flaw was found in the Linux kernel's ext4 filesystem. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
An issue was discovered in the Linux kernel through 4.17.10. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in the Linux kernel through 4.17.10. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in the Linux kernel through 4.17.10. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in the Linux kernel through 4.17.10. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in the Linux kernel through 4.17.10. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in the Linux kernel through 4.17.10. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in GitLab Community and Enterprise Edition 11.1.x before 11.1.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A flaw was found in the Linux kernel's ext4 filesystem. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
A flaw was found in the Linux kernel's ext4 filesystem. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.
A flaw was found in the Linux kernel's ext4 filesystem. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.
Poppler through 0.62 contains an out of bounds read vulnerability due to an incorrect memory access that is not mapped in its memory space, as demonstrated by pdfunite. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.
When F5 BIG-IP ASM 13.0.0-13.1.0.1, 12.1.0-12.1.3.5, 11.6.0-11.6.3.1, or 11.5.1-11.5.6 is processing HTTP requests, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Through undisclosed methods, on F5 BIG-IP 13.0.0-13.1.0.7, 12.1.0-12.1.3.5, 11.6.0-11.6.3.1, or 11.2.1-11.5.6, adjacent network attackers can cause a denial of service for VCMP guest and host. Rated high severity (CVSS 7.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.5, or 11.6.0-11.6.3.1 virtual servers with HTTP/2 profiles enabled are vulnerable to "HPACK Bomb". Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
VMware ESXi (6.7 before ESXi670-201806401-BG, 6.5 before ESXi650-201806401-BG, 6.0 before ESXi600-201806401-BG and 5.5 before ESXi550-201806401-BG), Workstation (14.x before 14.1.2), and Fusion (10.x. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
Linux kernel is vulnerable to a stack-out-of-bounds write in the ext4 filesystem code when mounting and writing to a crafted ext4 image in ext4_update_inline_data(). Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.