CVE-2016-4053

Severity: low (CVSS 3.7 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 14.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-04-25 · updated 2026-06-17
Weakness: CWE-119

Description

Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote attackers to obtain sensitive stack layout information via crafted Edge Side Includes (ESI) responses, related to incorrect use of assert and compiler optimization.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.10, 16.04
Oracle Corporation Oracle Linux: 6, 7
Squid: 3.0, 3.1, 3.1.0.1, 3.1.0.2, 3.1.0.3, 3.1.0.4 (+134)

References

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/2016/dsa-3625
http://www.openwall.com/lists/oss-security/2016/04/20/6
http://www.openwall.com/lists/oss-security/2016/04/20/9
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/86788
http://www.securityfocus.com/bid/91787
http://www.securitytracker.com/id/1035647
http://www.squid-cache.org/Advisories/SQUID-2016_6.txt

Get alerted when CVE-2016-4053 or the next vulnerability affects your stack