New cvs packages are available for Slackware 8.1, 9.0, 9.1, and -current to fix a buffer overflow vulnerability which could allow an attacker to run arbitrary programs on the CVS server. Sites running a CVS server should upgrade to the new CVS package right away.
More details about this issue may be found in the Common Vulnerabilities and Exposures (CVE) database:
Here are the details from the Slackware 9.1 ChangeLog:
Wed May 19 14:16:32 PDT 2004 patches/packages/cvs-1.11.16-i486-1.tgz: Upgraded to cvs-1.11.16. From the NEWS file: A potential buffer overflow vulnerability in the server has been fixed. Prior to this patch, a malicious client could potentially use carefully crafted server requests to run arbitrary programs on the CVS server machine. For more details, see: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0396 ( Security fix )
Where to find the new packages:
Updated package for Slackware 8.1: ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/packages/cvs-1.11.16-i386-1.tgz
Updated package for Slackware 9.0: ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/cvs-1.11.16-i386-1.tgz
Updated package for Slackware 9.1: ftp://ftp.slackware.com/pub/slackware/slackware-9.1/patches/packages/cvs-1.11.16-i486-1.tgz
Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/d/cvs-1.11.16-i486-1.tgz
Slackware 8.1 package: 331f90ce4d283fb21fb83b5367931a46 cvs-1.11.16-i386-1.tgz
Slackware 9.0 package: 26d5ccf024151d8738abd0c62e78a6ac cvs-1.11.16-i386-1.tgz
Slackware 9.1 package: a65697b36eae4b10c7418eea2c3f0c0e cvs-1.11.16-i486-1.tgz
Slackware -current package: dc3175ea975873d4e18fcc250e5dba2b cvs-1.11.16-i486-1.tgz
First, shut down the cvs server if you are running one.
Then, upgrade the package: > upgradepkg cvs-1.11.16-i486-1.tgz
Finally, restart the CVS server.