Joined: 12 May 2004
|Posted: Mon Sep 07, 2009 1:26 am Post subject: [ GLSA 200909-01 ] Linux-PAM: Privilege escalation
|Gentoo Linux Security Advisory
Title: Linux-PAM: Privilege escalation (GLSA 200909-01)
Date: September 07, 2009
An error in the handling of user names of Linux-PAM might allow remote
attackers to cause a Denial of Service or escalate privileges.
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
Vulnerable: < 1.0.4
Unaffected: >= 1.0.4
Architectures: All supported architectures
Marcus Granado repoted that Linux-PAM does not properly handle user
names that contain Unicode characters. This is related to integer
signedness errors in the pam_StrTok() function in libpam/pam_misc.c.
A remote attacker could exploit this vulnerability to cause a Denial of
Service. A remote authenticated attacker could exploit this
vulnerability to log in to a system with the account of a user that has
a similar user name, but with non-ASCII characters.
There is no known workaround at this time.
All Linux-PAM users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-libs/pam-1.0.4"
Last edited by GLSA on Wed Aug 11, 2010 4:29 am; edited 3 times in total