NSFOCUS SA2004-02 : HP-UX stmkfont Local Privilege Escalation Vulnerability

2004-10-23T00:00:00
ID SECURITYVULNS:DOC:7056
Type securityvulns
Reporter Securityvulns
Modified 2004-10-23T00:00:00

Description

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NSFOCUS Security Advisory(SA2004-02)

Topic: HP-UX stmkfont Local Privilege Escalation Vulnerability

Release Date: 2004-10-20

CVE CAN ID: CAN-2004-0965

http://www.nsfocus.com/english/homepage/research/0402.htm

Affected system:

    • HP-UX B.11.00
    • HP-UX B.11.11
    • HP-UX B.11.22
    • HP-UX B.11.23

Summary:

NSFOCUS Security Team found a security vulnerability during an external command execution in the program stmkfont of HP HP-UX system. Exploiting this vulnerability local attackers could gain group 'bin' privilege.

Description:

HP-UX stmkfont is installed sgid 'bin' bit by default.

stmkfont uses relative path when executing some external commands, and local attackers could cause stmkfont to call any specified external command by setting PATH environment variable. Therefore, attackers could run arbitrary command with the privilege of group 'bin'.

Workaround:

NSFOCUS suggests to temporarily remove the sgid 'bin' bit from stmkfont:

chmod a-s /usr/bin/stmkfont

Vendor Status:

2004.10.20 Vendor released a security bulletin (HPSBUX01088) and relative patches for the vulnerability.

Detailed information for the HP security bulletin is available at: http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX01088

Note: 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 Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2004-0965 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. Candidates may change significantly before they become official CVE entries.

Acknowledgment

Yang Jilong of NSFOCUS Security Team found the vulnerability.

DISCLAIMS:

THE INFORMATION PROVIDED IS RELEASED BY NSFOCUS "AS IS" WITHOUT WARRANTY OF ANY KIND. NSFOCUS DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, EXCEPT FOR THE WARRANTIES OF MERCHANTABILITY. IN NO EVENT SHALL NSFOCUS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF NSFOCUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. DISTRIBUTION OR REPRODUCTION OF THE INFORMATION IS PROVIDED THAT THE ADVISORY IS NOT MODIFIED IN ANY WAY.

Copyright 1999-2003 NSFOCUS. All Rights Reserved. Terms of use.

NSFOCUS Security Team <security@nsfocus.com> NSFOCUS INFORMATION TECHNOLOGY CO.,LTD (http://www.nsfocus.com)

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