To: bugtraqat_private announceat_private scoannmodat_private ______________________________________________________________________________ Caldera International, Inc. Security Advisory Subject: OpenServer 5.0.5 OpenServer 5.0.6 : crontab format string vulnerability Advisory number: CSSA-2002-SCO.35 Issue date: 2002 July 22 Cross reference: ______________________________________________________________________________ 1. Problem Description The crontab program contains a format string vulnerability that can be used by a malicious user to execute code to gain privilege. 2. Vulnerable Supported Versions System Binaries ---------------------------------------------------------------------- OpenServer 5.0.5 /etc/cron /usr/bin/at /usr/bin/crontab OpenServer 5.0.6 /etc/cron /usr/bin/at /usr/bin/crontab 3. Solution The proper solution is to install the latest packages. 4. OpenServer 5.0.5 4.1 Location of Fixed Binaries ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.35 4.2 Verification MD5 (VOL.000.000) = 044edeae4a5db58a5a27078d70bf2060 md5 is available for download from ftp://ftp.caldera.com/pub/security/tools 4.3 Installing Fixed Binaries Upgrade the affected binaries with the following commands: 1) Download the VOL* files to the /tmp directory Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 5. OpenServer 5.0.6 5.1 Location of Fixed Binaries ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.35 5.2 Verification MD5 (VOL.000.000) = 044edeae4a5db58a5a27078d70bf2060 md5 is available for download from ftp://ftp.caldera.com/pub/security/tools 5.3 Installing Fixed Binaries Upgrade the affected binaries with the following commands: 1) Download the VOL* files to the /tmp directory Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 6. References Specific references for this advisory: Strategic Reconnaissance Team Security Advisory (SRT2002-06-04-1611) http://www.snosoft.com Caldera security resources: http://www.caldera.com/support/security/index.html This security fix closes Caldera incidents sr864228, fz520964, erg712045. 7. Disclaimer Caldera International, Inc. 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 Caldera products. 8. Acknowledgements KF (dotslashat_private) discovered and researched this vulnerability. ______________________________________________________________________________
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