Bluez
CVE-2020-0556
HIGH
Vulnerability Assessment
| Impact | CVSS score of 7.1 (HIGH). Attack characteristics: adjacent network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | Successful exploitation could compromise the high-severity affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
Improper access control in subsystem for BlueZ before version 5.54 may allow an unauthenticated user to potentially enable escalation of privilege and denial of service via adjacent access. Rated high severity (CVSS 7.1), this vulnerability is no authentication required, low attack complexity.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Improper access control in subsystem for BlueZ before version 5.54 may allow an unauthenticated user to potentially enable escalation of privilege and denial of service via adjacent access Affected products include: Bluez, Canonical Ubuntu Linux, Debian Debian Linux, Opensuse Leap. Version information: version 5.54.
Know when Bluez gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
Improper access control in subsystem for BlueZ before version 5.54 may allow an unauthenticated user to potentially enable escalation of privilege and denial of service via adjacent access
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
All versions of the SDP server in BlueZ 5.46 and earlier are vulnerable to an information disclosure vulnerability which
A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. Rated high severity (CVSS 8.8), this vu
A heap overflow vulnerability was found in bluez in versions prior to 5.63. Rated high severity (CVSS 8.8), this vulnera
In BlueZ 5.42, an out-of-bounds read was identified in "packet_hexdump" function in "monitor/packet.c" source file. Rate
In BlueZ 5.42, a buffer overflow was observed in "read_n" function in "tools/hcidump.c" source file. Rated high severity
An issue was discovered in bluetoothd in BlueZ through 5.48. Rated medium severity (CVSS 6.5), this vulnerability is no
BlueZ is a Bluetooth protocol stack for Linux. Rated medium severity (CVSS 6.5), this vulnerability is no authentication
In BlueZ 5.42, a use-after-free was identified in "conf_opt" function in "tools/parser/l2cap.c" source file. Rated mediu
In BlueZ 5.42, a buffer over-read was observed in "l2cap_dump" function in "tools/parser/l2cap.c" source file. Rated med
In BlueZ 5.42, a buffer over-read was identified in "l2cap_packet" function in "monitor/packet.c" source file. Rated med
In BlueZ 5.42, a buffer overflow was observed in "pklg_read_hci" function in "btsnoop.c" source file. Rated medium sever
In BlueZ 5.42, an out-of-bounds read was observed in "le_meta_ev_dump" function in "tools/parser/hci.c" source file. Rat
GitHub PoC
Exploit-DB