CVE-2016-4052

Publication date 25 April 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Multiple stack-based buffer overflows in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote HTTP servers to cause a denial of service or execute arbitrary code via crafted Edge Side Includes (ESI) responses.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
squid3	16.04 LTS xenial	Fixed 3.5.12-1ubuntu7.2
	15.10 wily	Fixed 3.3.8-1ubuntu16.3
	14.04 LTS trusty	Fixed 3.3.8-1ubuntu6.8
	12.04 LTS precise	Fixed 3.1.19-1ubuntu3.12.04.7

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
squid3	Upstream: http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11841.patch Upstream: http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12697.patch Upstream: http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14034.patch

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.1 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	8.1 · High
Exploitability score	-
Impact score	-

CVE-2016-4052

Cvss 3 Severity Score

Description

Status

Patch details

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references

Access our resources on patching vulnerabilities