CVE-2016-4555

Publication date 10 May 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

client_side_request.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 crafted Edge Side Includes (ESI) responses.

Read the notes from the security team

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

Notes

sbeattie

need to verify if ESI is enabled in package (see advisory)

mdeslaur

3.1 not vulnerable to CVE-2016-4555, but is for CVE-2016-4556

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/v3/3.4/changesets/SQUID-2016_9.patch Upstream: http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-2995-1
Squid vulnerabilities
9 June 2016