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Vulnerability record · CVE-2016-4053 · published 25 April 2016

CVE-2016-4053: Squid-cache squid memory buffer overflow vulnerability

Squid Cache · Squid

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.

3.7 CVSS 3.0 Low EPSS 14% · top 3.5% CWE-119 · Memory buffer overflow
3.7CVSS 3.0 base score, v2 4.3
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
34References
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/04/20/9 Mailing ListThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html PatchThird Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securityfocus.com/bid/86788
http://www.securityfocus.com/bid/91787 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1035647 Third Party AdvisoryVDB Entry
http://www.squid-cache.org/Advisories/SQUID-2016_6.txt Vendor Advisory
http://www.ubuntu.com/usn/USN-2995-1 Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1138
https://access.redhat.com/errata/RHSA-2016:1139
https://access.redhat.com/errata/RHSA-2016:1140
https://security.gentoo.org/glsa/201607-01
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 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/04/20/9 Mailing ListThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html PatchThird Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securityfocus.com/bid/86788
http://www.securityfocus.com/bid/91787 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1035647 Third Party AdvisoryVDB Entry
http://www.squid-cache.org/Advisories/SQUID-2016_6.txt Vendor Advisory
http://www.ubuntu.com/usn/USN-2995-1 Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1138
https://access.redhat.com/errata/RHSA-2016:1139
https://access.redhat.com/errata/RHSA-2016:1140
https://security.gentoo.org/glsa/201607-01

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Source: NIST National Vulnerability Database (record CVE-2016-4053), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.