| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200909-01"> |
| <title>Linux-PAM: Privilege escalation</title> |
| <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. |
| </synopsis> |
| <product type="ebuild">pam</product> |
| <announced>September 07, 2009</announced> |
| <revised>September 07, 2009: 01</revised> |
| <bug>261512</bug> |
| <access>remote</access> |
| <affected> |
| <package name="sys-libs/pam" auto="yes" arch="*"> |
| <unaffected range="ge">1.0.4</unaffected> |
| <vulnerable range="lt">1.0.4</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| 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. |
| </p> |
| </background> |
| <description> |
| <p> |
| 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. |
| </p> |
| </description> |
| <impact type="normal"> |
| <p> |
| 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. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| There is no known workaround at this time. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All Linux-PAM users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=sys-libs/pam-1.0.4"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0887">CVE-2009-0887</uri> |
| </references> |
| <metadata tag="requester" timestamp="Fri, 10 Jul 2009 18:01:34 +0000"> |
| craig |
| </metadata> |
| <metadata tag="submitter" timestamp="Fri, 28 Aug 2009 16:33:27 +0000"> |
| a3li |
| </metadata> |
| <metadata tag="bugReady" timestamp="Mon, 31 Aug 2009 03:38:46 +0000"> |
| a3li |
| </metadata> |
| </glsa> |