CVE-2023-4863
Memory Safety in Fedoraproject Fedora 37 … 39
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-4863 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Fedoraproject Fedora. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); ranked in the top 0.0% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
The vulnerability CVE-2023-4863 is a heap buffer overflow in the libwebp library, present in Google Chrome versions prior to 116.0.5845.187 and in libwebp releases before 1.3.2. It is tracked as CWE-787 and rated critical with a CVSS 3.1 score of 8.8, reflecting network attack vector, low complexity, and no required privileges.
An unauthenticated remote attacker can exploit the flaw by delivering a crafted HTML page that triggers an out-of-bounds memory write during WebP image processing. Successful exploitation can result in arbitrary code execution or full compromise of the confidentiality, integrity, and availability of the target system.
References on the OpenWall OSS-security mailing lists document the issue and point to the availability of fixes in the noted Chrome and libwebp releases. The associated EPSS score stands at a current value of 0.9330 with a recorded peak of 0.9412.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-2533
Vulnerability Data
Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
- CWE(s)
- KEV Date Added
- 13 September 2023
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.
Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.
Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.