Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
[ GLSA 200909-01 ] Linux-PAM: Privilege escalation
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index News & Announcements
View previous topic :: View next topic  
Author Message
GLSA
Veteran
Veteran


Joined: 12 May 2004
Posts: 1582

PostPosted: Mon Sep 07, 2009 1:26 am    Post subject: [ GLSA 200909-01 ] Linux-PAM: Privilege escalation Reply with quote

Gentoo Linux Security Advisory

Title: Linux-PAM: Privilege escalation (GLSA 200909-01)
Severity: normal
Exploitable: remote
Date: September 07, 2009
Bug(s): #261512
ID: 200909-01

Synopsis


An error in the handling of user names of Linux-PAM might allow remote
attackers to cause a Denial of Service or escalate privileges.


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.


Affected Packages

Package: sys-libs/pam
Vulnerable: < 1.0.4
Unaffected: >= 1.0.4
Architectures: All supported architectures


Description


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.


Impact


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.


Workaround


There is no known workaround at this time.


Resolution


All Linux-PAM users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-libs/pam-1.0.4"


References

CVE-2009-0887


Last edited by GLSA on Wed Aug 11, 2010 4:29 am; edited 3 times in total
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index News & Announcements All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum