Linux-PAM: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201206-31 / pam
Release Date	June 25, 2012
Latest Revision	June 25, 2012: 1
Impact	high
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
sys-libs/pam	< 1.1.5	>= 1.1.5	All supported architectures

Related bugreports: #343399, #386273, #388431

Synopsis

Multiple vulnerabilities have been found in Linux-PAM, allowing local attackers to possibly gain escalated privileges, cause a Denial of Service, corrupt data, or obtain sensitive information.

2. Impact Information

Background

Linux-PAM (Pluggable Authentication Modules) is an architecture allowing the separation of the development of privilege granting software from the development of secure and appropriate authentication schemes.

Description

Multiple vulnerabilities have been discovered in Linux-PAM. Please review the CVE identifiers referenced below for details.

Impact

A local attacker could use specially crafted files to cause a buffer overflow, possibly resulting in privilege escalation or Denial of Service. Furthermore, a local attacker could execute specially crafted programs or symlink attacks, possibly resulting in data loss or disclosure of sensitive information.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Linux-PAM users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-libs/pam-1.1.5"

NOTE: This is a legacy GLSA. Updates for all affected architectures are available since November 25, 2011. It is likely that your system is already no longer affected by this issue.

4. References

Page updated June 25, 2012

Summary: This is a Gentoo Linux Security Advisory

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