CVE-2021-31806

EPSS 95.8%

Vexday Risk Score

40Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS —EPSS 95.8%KEV nãoPoC —Nuclei —Metasploit simPatch referenciado

Lifecycle

27 May 2021Metasploit module available

27 May 2021Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request processing.

Affected products

n/a · n/a

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References

http://seclists.org/fulldisclosure/2023/Oct/14 https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/https://security.netapp.com/advisory/ntap-20210716-0007/https://www.debian.org/security/2021/dsa-4924 http://www.openwall.com/lists/oss-security/2023/10/11/3 http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch