CVE-2015-5400
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 20.84% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 97.3% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2015-09-28 20:00Z11 YR AGO
- Last updated
- 2024-08-06 06:50Z2 YR AGO
- Reserved
- 2015-07-06
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 9d9d4357f11b427293c8fc670b767dae14a48d0536a5218c36bed28f69abdea4
05 Affected products
06 References
- www.openwall.com[oss-security] 20150706 Squid HTTP proxy CVE requesthttp://www.openwall.com/lists/oss-security/2015/07/06/8
- www.securitytracker.com1032873http://www.securitytracker.com/id/1032873
- lists.fedoraproject.orgFEDORA-2016-7b40eb9e29http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html
- www.squid-cache.orghttp://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patch
- lists.opensuse.orgSUSE-SU-2016:1996http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
- www.openwall.com[oss-security] 20150717 Re: Re: Squid HTTP proxy CVE requesthttp://www.openwall.com/lists/oss-security/2015/07/17/14
- www.openwall.com[oss-security] 20150709 Re: Squid HTTP proxy CVE requesthttp://www.openwall.com/lists/oss-security/2015/07/09/12
- lists.opensuse.orgopenSUSE-SU-2016:2081http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
- www.squid-cache.orghttp://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patch
- www.openwall.com[oss-security] 20150710 Re: Squid HTTP proxy CVE requesthttp://www.openwall.com/lists/oss-security/2015/07/10/2
- lists.opensuse.orgSUSE-SU-2016:2089http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
- www.squid-cache.orghttp://www.squid-cache.org/Advisories/SQUID-2015_2.txt
- www.debian.orgDSA-3327http://www.debian.org/security/2015/dsa-3327
- www.securityfocus.com75553http://www.securityfocus.com/bid/75553
- www.squid-cache.orghttp://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13225.patch
07 Fixed in
Debian 12
- squid Fixed in 4.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- squid Fixed in 4.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- squid Fixed in 4.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- squid3 Fixed in 3.5.12-1ubuntu6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.