A buffer overflow flaw in glibc's getgrouplist function could be exploited in a denial-of-service attack against the affected machine.
Affected versions of Red Hat include 7.1, 7.2, 7.3, 8.0 and 9.
For Red Hat updates, see https://rhn.redhat.com/errata/RHSA-2003-325.html.
Affected versions of Mandrake include 9.0, 9.1, Multi Network Firewall 8.2 and Corporate Server 2.1.
For Mandrake updates, see http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2003:107.