Vulnerability in Squid-Cache Squid
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 proxy via a CONNECT request.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 6.8 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.208 (97.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.208 · newest: 0.208 · change: 0.000
Affected products
- Squid-Cache Squid
- Debian Linux — versions 7.0, 8.0
- Fedoraproject Fedora — versions 22
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2015/07/06/8 (mailing-list)
- www.securitytracker.com/id/1032873 (vdb-entry)
- lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html (vendor-advisory)
- www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patch (Exploit, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html (vendor-advisory)
- www.openwall.com/lists/oss-security/2015/07/17/14 (mailing-list, Exploit)
- www.openwall.com/lists/oss-security/2015/07/09/12 (mailing-list)
- lists.opensuse.org/opensuse-updates/2016-08/msg00069.html (vendor-advisory)
- www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patch (Exploit, Vendor Advisory)
- www.openwall.com/lists/oss-security/2015/07/10/2 (mailing-list)
Frequently asked questions
- What is CVE-2015-5400?
- CVE-2015-5400 is a vulnerability in Squid-Cache Squid, classified under CWE-264. Published 2015-09-28.
- Is CVE-2015-5400 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.