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Date: 25 Oct 2004 15:49:23 +0200 From: SecuriTeam <support@securiteam.com> To: list@securiteam.com Subject: [UNIX] HP-UX stmkfont Local Privilege Escalation Vulnerability The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com - - promotion The SecuriTeam alerts list - Free, Accurate, Independent. Get your security news from a reliable source. http://www.securiteam.com/mailinglist.html - - - - - - - - - HP-UX stmkfont Local Privilege Escalation Vulnerability ------------------------------------------------------------------------ SUMMARY The stmkfont utility in HP-UX suffers from a vulnerability that may lead to privilege escalation with 'bin' group privileges. DETAILS Vulnerable Systems: * HP-UX B.11.00 * HP-UX B.11.11 * HP-UX B.11.22 * HP-UX B.11.23 Immune Systems: * HP-UX systems with patches PHSS_31990 - HP-UX B.11.23, PHSS_31989 - HP-UX B.11.22, PHSS_31988 - HP-UX B.11.11, PHSS_31987 - HP-UX B.11.00 CVE Information: <http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0965>; CAN-2004-0965 HP-UX stmkfont is installed sgid 'bin' bit by default. Stmkfont uses relative paths when executing external commands. Thus, local attackers could cause stmkfont to execute any specified external command by setting the PATH environment variable. Therefore, attackers could run arbitrary commands with the privileges of group 'bin'. Workaround As a temporary workaround, the stmkfont executable can be run without the sgid 'bin' bit. In order to disable it: # chmod a-s /usr/bin/stmkfont Vendor Status: The vendor (HP-UX) has released a security bulletin <http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX01088>; http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX01088 regarding this issue, along with patches for vulnerable OS versions. Note: A valid ITRC account is required for the link above. Patch IDs: * PHSS_31990 - HP-UX B.11.23 * PHSS_31989 - HP-UX B.11.22 * PHSS_31988 - HP-UX B.11.11 * PHSS_31987 - HP-UX B.11.00 ADDITIONAL INFORMATION The information has been provided by <mailto:security@nsfocus.com> NSFOCUS Security Team. The original article can be found at: <http://www.nsfocus.com/english/homepage/research/0402.htm>; http://www.nsfocus.com/english/homepage/research/0402.htm
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DISCLAIMER: The information in this bulletin is provided "AS IS" without warranty of any kind. In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.
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