CVE-2017-5462

Publication date 20 April 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw in DRBG number generation within the Network Security Services (NSS) library where the internal state V does not correctly carry bits over. The NSS library has been updated to fix this issue to address this issue and Firefox ESR 52.1 has been updated with NSS version 3.28.4. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	17.04 zesty	Fixed 53.0+build6-0ubuntu0.17.04.1
	16.10 yakkety	Fixed 53.0+build6-0ubuntu0.16.10.1
	16.04 LTS xenial	Fixed 53.0+build6-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 53.0+build6-0ubuntu0.14.04.1
	12.04 LTS precise	Ignored
nss	17.04 zesty	Fixed 2:3.28.4-0ubuntu0.17.04.1
	16.10 yakkety	Fixed 2:3.28.4-0ubuntu0.16.10.1
	16.04 LTS xenial	Fixed 2:3.28.4-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 2:3.28.4-0ubuntu0.14.04.1
	12.04 LTS precise	Ignored end of life
thunderbird	17.04 zesty	Fixed 1:52.1.1+build1-0ubuntu0.17.04.1
	16.10 yakkety	Fixed 1:52.1.1+build1-0ubuntu0.16.10.1
	16.04 LTS xenial	Fixed 1:52.1.1+build1-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 1:52.1.1+build1-0ubuntu0.14.04.1
	12.04 LTS precise	Ignored end of life

Notes

leosilva

fixed for nss in precise after version upgrade

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/7248d38b76e5

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N