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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200909-01">
<title>Linux-PAM: Privilege escalation</title>
An error in the handling of user names of Linux-PAM might allow remote
attackers to cause a Denial of Service or escalate privileges.
<product type="ebuild">pam</product>
<announced>September 07, 2009</announced>
<revised>September 07, 2009: 01</revised>
<package name="sys-libs/pam" auto="yes" arch="*">
<unaffected range="ge">1.0.4</unaffected>
<vulnerable range="lt">1.0.4</vulnerable>
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
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 type="normal">
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 &quot;&gt;=sys-libs/pam-1.0.4&quot;</code>
<uri link="">CVE-2009-0887</uri>
<metadata tag="requester" timestamp="Fri, 10 Jul 2009 18:01:34 +0000">
<metadata tag="submitter" timestamp="Fri, 28 Aug 2009 16:33:27 +0000">
<metadata tag="bugReady" timestamp="Mon, 31 Aug 2009 03:38:46 +0000">