CVE-2016-3947

Publication date 7 April 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.

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/v3/3.1/changesets/squid-3.1-10495.patch Upstream: http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch Upstream: http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch

Severity score breakdown

Parameter	Value
Base score	8.2 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

References

Related Ubuntu Security Notices (USN)

USN-2995-1
Squid vulnerabilities
9 June 2016