Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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-2023-46847 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in Redhat Enterprise Linux Server Tus. Its CVSS base score is 8.6 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked in the top 0.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
Squid is vulnerable to a denial of service condition caused by a heap buffer overflow when the proxy is configured to accept HTTP Digest authentication. A remote attacker can write up to 2 MB of arbitrary data into heap memory, which is tracked under CWE-120 and carries a CVSS 3.1 base score of 8.6.
An unauthenticated attacker with network access can trigger the overflow simply by sending crafted HTTP requests to an affected Squid instance that has Digest authentication enabled, resulting in a crash or potentially further integrity and confidentiality impacts.
Red Hat has published multiple errata (RHSA-2023:6266, RHSA-2023:6267, RHSA-2023:6268, RHSA-2023:6748, and RHSA-2023:6801) that address the issue through updated packages; administrators should apply the relevant updates for their distributions.
The CVE’s EPSS score reached a peak of 0.4474 after disclosure before settling at 0.3821, indicating a noticeable rise in exploitation interest that warrants renewed attention.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-51013
Vulnerability Data
Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest Authentication.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V5.2.1
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.
Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.
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 identification processes such as code review or scanning detect classic buffer overflows before exploitation.
Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.
Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.
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.