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PAM S/Key: Information disclosure


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201402-12 / pam_skey
Release Date February 09, 2014
Latest Revision February 09, 2014: 1
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
sys-auth/pam_skey < 1.1.5-r5 >= 1.1.5-r5 All supported architectures

Related bugreports: #482588


PAM S/Key does not clear provided credentials from memory, allowing local attackers to gain access to cleartext credentials.

2.  Impact Information


PAM S/Key is a pluggable authentication module for the OpenBSD Single-key Password system.


Ulrich Müller reported that a Gentoo patch to PAM S/Key does not remove credentials provided by the user from memory.


A local attacker with privileged access could inspect a memory dump to gain access to cleartext credentials provided by users.

3.  Resolution Information


There is no known workaround at this time.


All PAM S/Key users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-auth/pam_skey-1.1.5-r5"

4.  References


Page updated February 09, 2014

Summary: This is a Gentoo Linux Security Advisory

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