CVE-2011-4973

Publication date 15 February 2018

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid user by using their certificate and entering 'password' as the password.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libapache2-mod-nss	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not in release
	19.04 disco	Not in release
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Vulnerable
	17.10 artful	Ignored end of life
	17.04 zesty	Ignored end of life
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Vulnerable
	15.10 wily	Ignored end of life
	15.04 vivid	Ignored end of life
	14.10 utopic	Ignored end of life
	14.04 LTS trusty	Not in release
	13.10 saucy	Ignored end of life
	13.04 raring	Ignored end of life
	12.10 quantal	Ignored end of life
	12.04 LTS precise	Ignored end of life
	10.04 LTS lucid	Not in release

Patch details

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

Package	Patch details
libapache2-mod-nss	Upstream: ?id=a6c

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H