CVE-2021-33620
35Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 80%
exploitation probability
80%top 1% of all CVEs
observed exploitation
nono source reports it
Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.
CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:L/S:U/UI:N
Affected products
n/a · n/aReferences
http://seclists.org/fulldisclosure/2023/Oct/14https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7fhttps://lists.debian.org/debian-lts-announce/2021/06/msg00014.htmlhttps://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/http://www.openwall.com/lists/oss-security/2023/10/11/3http://www.squid-cache.org/Versions/v4/changesets/squid-4-1e05a85bd28c22c9ca5d3ac9f5e86d6269ec0a8c.patchhttp://www.squid-cache.org/Versions/v5/changesets/squid-5-8af775ed98bfd610f9ce762fe177e01b2675588c.patch