CVE-2016-4553

Publication date 10 May 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.

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	Not affected

Notes

sbeattie

3.2.0.11 and later versions up to and including 3.5.17

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/v3/3.5/changesets/squid-3.5-14039.patch Upstream: http://bazaar.launchpad.net/~squid/squid/3.4/revision/13240

Severity score breakdown

Parameter	Value
Base score	8.6 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Changed
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-2995-1
Squid vulnerabilities
9 June 2016