-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ 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 System Binaries ---------------------------------------------------------------------- OpenServer 5.0.7 /usr/lib/sysadm/authsh /usr/lib/sysadm/backupsh 3. Solution The proper solution is to install the latest packages. 4. OpenServer 5.0.7 4.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.40 4.2 Verification MD5 (VOL.000.000) = ebcf85edb0e7c8c0a3af4cec65a27ed7 md5 is available for download from ftp://ftp.sco.com/pub/security/tools 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 images. 5. References Specific references for this advisory: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2926 SCO security resources: http://www.sco.com/support/security/index.html SCO security advisories via email http://www.sco.com/support/forums/security.html This security fix closes SCO incidents sr894990 fz532992 erg712939 sr894993 fz532995 erg712941. 6. Disclaimer 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 products. 7. Acknowledgments SCO would like to thank iDefense for discovering and reporting this weakness. ______________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (SCO_SV) Comment: For info see http://www.gnupg.org iEYEARECAAYFAkNX5bQACgkQaqoBO7ipriHu4wCgo+xDebe8Xjzx8xa46L1wgRCf UTsAoJQjHfZNCfgLUXhnZK1N7PkDEpGG =j+3D -----END PGP SIGNATURE-----
