CVE-2016-5285

Publication date 16 November 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A Null pointer dereference vulnerability exists in Mozilla Network Security Services due to a missing NULL check in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime, which could let a remote malicious user cause a Denial of Service.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
nss	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Fixed 2:3.26.2-0ubuntu0.16.04.2
	14.04 LTS trusty	Fixed 2:3.26.2-0ubuntu0.14.04.3
	12.04 LTS precise	Fixed 2:3.26.2-0ubuntu0.12.04.1

Notes

mdeslaur

per upstream bug, this was fixed in 3.25, but patch for 3.21 fixes it differently.

Patch details

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

Package	Patch details
nss	Upstream: https://hg.mozilla.org/projects/nss/rev/45c047d18ac4

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H