Toaruos
CVE-2019-13048
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Integer overflow checks
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A local attacker with access to the system could cause unexpected behavior through arithmetic overflow. |
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Alert meAnalysisAI
kernel/sys/syscall.c in ToaruOS through 1.10.9 allows a denial of service upon a critical error in certain sys_sbrk allocation patterns (involving PAGE_SIZE, and a value less than PAGE_SIZE). Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.
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Technical ContextAI · show details
This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. kernel/sys/syscall.c in ToaruOS through 1.10.9 allows a denial of service upon a critical error in certain sys_sbrk allocation patterns (involving PAGE_SIZE, and a value less than PAGE_SIZE). Affected products include: Toaruos Project Toaruos. Version information: through 1.10.9.
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
kernel/sys/syscall.c in ToaruOS through 1.10.9 allows a denial of service upon a critical error in certain sys_sbrk allocation patterns (involving PAGE_SIZE, and a value less than PAGE_SIZE).
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
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
Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
readelf in ToaruOS 2.0.1 has a global overflow allowing RCE when parsing a crafted ELF file. Rated high severity (CVSS 7
An integer wrap in kernel/sys/syscall.c in ToaruOS 1.10.10 allows users to map arbitrary kernel pages into userland proc
kernel/sys/syscall.c in ToaruOS through 1.10.9 has incorrect access control in sys_sysfunc case 9 for TOARU_SYS_FUNC_SET
linker/linker.c in ToaruOS through 1.10.9 has insecure LD_LIBRARY_PATH handling in setuid applications. Rated high sever
apps/gsudo.c in gsudo in ToaruOS through 1.10.9 has a buffer overflow allowing local privilege escalation to the root us
readelf in ToaruOS 2.0.1 has some arbitrary address read vulnerabilities when parsing a crafted ELF file. Rated low seve
Exploit-DB