CVE-2016-4556

Description

Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via a crafted Edge Side Includes (ESI) response.

7.5

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 56.86% Top 5%

Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory squid-cache.org

Affected: n/a n/a

References

Link	Tags
https://security.gentoo.org/glsa/201607-01	vendor advisory
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch	patch
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html	third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html	vendor advisory
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch
http://www.ubuntu.com/usn/USN-2995-1	third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2016/05/06/5	mailing list third party advisory release notes
https://access.redhat.com/errata/RHSA-2016:1140	vendor advisory
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html	vendor advisory
http://www.securitytracker.com/id/1035770	third party advisory vdb entry
https://access.redhat.com/errata/RHSA-2016:1138	vendor advisory
http://www.squid-cache.org/Advisories/SQUID-2016_9.txt	vendor advisory
https://access.redhat.com/errata/RHSA-2016:1139	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html	vendor advisory
http://www.openwall.com/lists/oss-security/2016/05/06/3	third party advisory mailing list
http://www.debian.org/security/2016/dsa-3625	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-4556?: CVE-2016-4556 has been scored as a high severity vulnerability.
How to fix CVE-2016-4556?: To fix CVE-2016-4556, 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-2016-4556 being actively exploited in the wild?: It is possible that CVE-2016-4556 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~57% probability that this vulnerability will be exploited by malicious actors in the next 30 days.