CVE & CISA-KEV CatalogNVD
CVE-2015-5400
MEDIUMEPSS 97th pctl6.8
CVSS v2
Description
Squid before 3.5.6 does not properly handle CONNECT method peer responses when configured with cache_peer, which allows remote attackers to bypass intended restrictions and gain access to a backend proxy via a CONNECT request.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
16.53%probability of exploitation in 30 days
97thpercentile
Very high risk: more likely to be exploited than 97% of all known CVEs.
References
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
- http://www.debian.org/security/2015/dsa-3327
- http://www.openwall.com/lists/oss-security/2015/07/06/8
- http://www.openwall.com/lists/oss-security/2015/07/09/12
- http://www.openwall.com/lists/oss-security/2015/07/10/2
- http://www.openwall.com/lists/oss-security/2015/07/17/14
- http://www.securityfocus.com/bid/75553
- http://www.securitytracker.com/id/1032873
- http://www.squid-cache.org/Advisories/SQUID-2015_2.txt
- http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patch
- http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13225.patch
- http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patch
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.