Input validation error in Squid - CVE-2016-4556
Published: May 10, 2016 / Updated: July 28, 2020
Vulnerability identifier: #VU32273
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-4556
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows remote servers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (crash) via a crafted Edge Side Includes (ESI) response.
Affected software
Squid
squid (Alpine package)
squid (Alpine package)
How to mitigate CVE-2016-4556
Update to version 3.5.18.
Squid - update to 3.5.18
squid (Alpine package) - update to 3.4.14-r2
squid (Alpine package) - update to 3.4.14-r2
External 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/2016/05/06/3
- http://www.openwall.com/lists/oss-security/2016/05/06/5
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securitytracker.com/id/1035770
- http://www.squid-cache.org/Advisories/SQUID-2016_9.txt
- http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch
- http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch
- http://www.ubuntu.com/usn/USN-2995-1
- 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