Yellow Dog Linux Security Announcement -------------------------------------- Package: groff Issue Date: January 27, 2002 Priority: high Advisory ID: YDU-20020127-11 1. Topic: New groff packages have been made available that fix an overflow in groff. If the printing system running this is a security issue, it is recommended to update to the new, fixed packages. 2. Problem: Groff is a document formatting system. The groff preprocessor contains an exploitable buffer overflow. If groff can be invoked within the LPRng printing system, an attacker can gain rights as the "lp" user. Remote exploitation may be possible if lpd is running and is accessible remotely, and the attacker knows the name of the printer and spoolfile. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0003 to this issue. Thanks to zen-parse for bringing this bug to our attention. (from Red Hat advisory) 3. Solution: a) Updating via yup... We suggest that you use the Yellow Dog Update Program (yup) to keep your system up-to-date. The following command(s) will automatically retrieve and install the fixed version of this update onto your system: yup update groff groff-gxditview groff-perl b) Updating manually... The update can also be retrieved manually from our ftp site below along with the rpm command that should be used to install the update. (Please use a mirror site) ftp://ftp.yellowdoglinux.com/pub/yellowdog/updates/yellowdog-2.1/ppc/ rpm -Fvh groff-1.17.2-7.0.2a.ppc.rpm rpm -Fvh groff-gxditview-1.17.2-7.0.2a.ppc.rpm rpm -Fvh groff-perl-1.17.2-7.0.2a.ppc.rpm 4. Verification MD5 checksum Package -------------------------------- ---------------------------- e5d92c7fc4df1919952b285474d0383b ppc/groff-1.17.2-7.0.2a.ppc.rpm 4c8e1de148a57b4e2c05240fc7bbfa1b ppc/groff-gxditview-1.17.2-7.0.2a.ppc.rpm 508550f96ed73bc80d916b68e436bbd9 ppc/groff-perl-1.17.2-7.0.2a.ppc.rpm e0a48ff4d69a2212923d7ea88e995c98 SRPMS/groff-1.17.2-7.0.2a.src.rpm If you wish to verify that each package has not been corrupted or tampered with, examine the md5sum with the following command: rpm --checksig --nogpg filename 5. Misc. Terra Soft has setup a moderated mailing list where these security, bugfix, and package enhancement announcements will be posted. See http://lists.yellowdoglinux.com/ for more information. For information regarding the usage of yup, the Yellow Dog Update Program, see http://http://www.yellowdoglinux.com/support/solutions/ydl_general/yup.shtml