CVE-2015-5400

Public Exploit

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.

Category

6.8
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 15.54% Top 10%
Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory squid-cache.org Vendor Advisory squid-cache.org Vendor Advisory squid-cache.org Vendor Advisory squid-cache.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2015/07/06/8 mailing list
http://www.securitytracker.com/id/1032873 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html vendor advisory
http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patch exploit vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html vendor advisory
http://www.openwall.com/lists/oss-security/2015/07/17/14 mailing list exploit
http://www.openwall.com/lists/oss-security/2015/07/09/12 mailing list
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html vendor advisory
http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patch exploit vendor advisory
http://www.openwall.com/lists/oss-security/2015/07/10/2 mailing list
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html vendor advisory
http://www.squid-cache.org/Advisories/SQUID-2015_2.txt vendor advisory
http://www.debian.org/security/2015/dsa-3327 vendor advisory
http://www.securityfocus.com/bid/75553 vdb entry
http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13225.patch exploit vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-5400?
CVE-2015-5400 has been scored as a medium severity vulnerability.
How to fix CVE-2015-5400?
To fix CVE-2015-5400, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-5400 being actively exploited in the wild?
It is possible that CVE-2015-5400 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~16% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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