Bug 261512 (CVE-2009-0887)

Summary:	<sys-libs/pam-1.0.4 pam_succeed_if non-ascii usernames privilege escalation (CVE-2009-0887)
Product:	Gentoo Security	Reporter:	Robert Buchholz (RETIRED) <rbu>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	pam-bugs+disabled
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://thread.gmane.org/gmane.comp.security.oss.general/1543
Whiteboard:	B3 [glsa]
Package list:		Runtime testing required:	---
Bug Depends on:	261108
Bug Blocks:

Description Robert Buchholz (RETIRED) gentoo-dev

2009-03-07 00:25:16 UTC

On Thursday 05 March 2009, Jan Lieskovsky wrote:
  Marcus Granado recently reported a security issue in 
libpam related to parsing of non-ascii usernames in
the Pam configuration files. Attaching his report for
more details.

Affected version: pam <= 1.0.3

Link to SCM repo: http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?view=log
Patch: http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?r1=1.9&amp;r2=1.10&amp;view=patch


Could you please allocate a new CVE id for it?

Comment 1 Diego Elio Pettenò (RETIRED) gentoo-dev

2009-03-07 00:29:08 UTC

ebuild? If this is <= 1.0.3 (and it seems to be from the CVS logs), this is getting stabled together with bug #261108.

Comment 2 Robert Buchholz (RETIRED) gentoo-dev

2009-03-07 00:47:54 UTC

correct, the patch is applied in 1.0.3 -- my fault.

Comment 3 Stefan Behte (RETIRED) gentoo-dev

2009-03-12 21:06:08 UTC

CVE-2009-0887 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-0887):
  Integer signedness error in the _pam_StrTok function in
  libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a
  configuration file contains non-ASCII usernames, might allow remote
  attackers to cause a denial of service, and might allow remote
  authenticated users to obtain login access with a different user's
  non-ASCII username, via a login attempt.

Comment 4 Robert Buchholz (RETIRED) gentoo-dev

2009-07-10 13:00:09 UTC

i vote YES

Comment 5 Stefan Behte (RETIRED) gentoo-dev

2009-07-10 18:01:55 UTC

YES, too. Request filed.

Comment 6 Alex Legler (RETIRED) archtester

2009-09-07 00:59:27 UTC

GLSA 200909-01