What is the CVSS score of CVE-2023-49991?

CVE-2023-49991 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.4%.

Is there a public PoC exploit available for CVE-2023-49991?

Yes, a public proof-of-concept exploit is available for CVE-2023-49991. Prioritise patching immediately. EPSS: 0.4%.

Espeak Ng CVE-2023-49991

MEDIUM

Out-of-bounds Write (CWE-787)

2023-12-12 cve@mitre.org

Memory Corruption Buffer Overflow Espeak Ng

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

CVE Published

Dec 12, 2023 - 14:15 nvd

MEDIUM 5.3

DescriptionNVD

Espeak-ng 1.52-dev was discovered to contain a Stack Buffer Underflow via the function CountVowelPosition at synthdata.c.

AnalysisAI

Espeak-ng 1.52-dev was discovered to contain a Stack Buffer Underflow via the function CountVowelPosition at synthdata.c. Rated medium severity (CVSS 5.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. Espeak-ng 1.52-dev was discovered to contain a Stack Buffer Underflow via the function CountVowelPosition at synthdata.c. Affected products include: Espeak-Ng.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).