[Full-disclosure] OpenServer 5.0.7 : authsh and backupsh buffer overflow
To: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org Date: Thu, 20 Oct 2005 15:46:32 -0700
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SCO Security Advisory
Subject: OpenServer 5.0.7 : authsh and backupsh buffer overflow
Advisory number: SCOSA-2005.40
Issue date: 2005 October 20
Cross reference: sr894990 fz532992 erg712939 sr894993 fz532995 erg712941 CAN-2005-2926
1. Problem Description
iDEFENSE has identified a Buffer Overflow vulnerability in
SCO Openserver backupsh. The backupsh utility is a standard
binary distributed with Openserver 5.0.7 and earlier.
Local attackers could supply a specially crafted string to
overflow a stack buffer and execute arbitrary code with group
backup privileges. Successful exploitation of this vulnerability
will result in execution of arbitrary code with permissions
of the running process. The binary is setgid backup by
default and can be used by attackers with a local account
to gain backup privileges.
The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CAN-2005-2926 to this issue.
2. Vulnerable Supported Versions
OpenServer 5.0.7 /usr/lib/sysadm/authsh
The proper solution is to install the latest packages.
4. OpenServer 5.0.7
4.1 Location of Fixed Binaries
MD5 (VOL.000.000) = ebcf85edb0e7c8c0a3af4cec65a27ed7
md5 is available for download from
4.3 Installing Fixed Binaries
Upgrade the affected binaries with the following sequence:
1) Download the VOL* files to a directory
2) Run the custom command, specify an install from media
images, and specify the directory as the location of the
Specific references for this advisory:
SCO security resources:
SCO security advisories via email
This security fix closes SCO incidents sr894990 fz532992
erg712939 sr894993 fz532995 erg712941.
SCO is not responsible for the misuse of any of the information
we provide on this website and/or through our security
advisories. Our advisories are a service to our customers
intended to promote secure installation and use of SCO
SCO would like to thank iDefense for discovering and reporting
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