[VulnWatch] NSFOCUS SA2003-07: HP-UX Software Distributor Buffer Overflow Vulnerability

From: NSFOCUS Security Team (security_at_nsfocus.com)
Date: 11/13/03

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    To: bugtraq@securityfocus.com
    Date: Thu, 13 Nov 2003 17:40:48 +0800
    
    

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    NSFOCUS Security Advisory(SA2003-07)

    Topic: HP-UX Software Distributor Buffer Overflow Vulnerability

    Release Date: 2003-11-13

    CVE CAN ID: CAN-2003-0089

    http://www.nsfocus.com/english/homepage/research/0307.htm

    Affected system:
    ===================

    - - HP-UX B.11.00
    - - HP-UX B.11.11

    Summary:
    =========

    NSFOCUS Security Team has found a buffer overflow in Software Distributor
    utilities for HP-UX. By exploiting the vulnerability local attackers could
    gain root privilege.

    Description:
    ============

    The Software Distributor(SD) utilities for HP-UX contain a number of programs
    such as swinstall. These programs are used to create, install, distribute
    and manage software products. A buffer overflow exists in the programs with
    suid root bit (such as swinstalll/swmodify etc) and allows local attackers
    to run arbitrary code with root privilege.

    If the environment variable LANG is set as a over large string, programs such
    as swinstall will copy it into a fixed-size buffer without any bound check,
    which causes a stack overflow. By overwriting the returned address and other
    data in the stack, local attackers could gain root privilege.

    Workaround:
    =============

    NSFOCUS suggests to temporarily remove the suid root bit for all the
    programs in SD utilities.

    # chmod a-s /usr/sbin/sw*

    Vendor Status:
    ==============

    2002.11.19 Informed the vendor
    2002.12.05 Vendor confirmed the vulnerability
    2003.11.05 Vendor released a security bulletin (HPSBUX0311-293) 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=HPSBUX0311-293

    Note: Valid ITRC account is required for the link above.

    Patch ID:

    HP-UX B.11.00 PHCO_28847
    HP-UX B.11.11 PHCO_28848

    Additional Information:
    ========================

    The Common Vulnerabilities and Exposures (CVE) project has assigned the
    name CAN-2003-0089 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)

    PGP Key: http://www.nsfocus.com/homepage/research/pgpkey.asc
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