The execve system call in Linux 2.4.x records the file descriptor of the executable process in the file table of the calling process, which allows local users to gain read access to restricted file descriptors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A327
http://www.redhat.com/support/errata/RHSA-2003-408.html
http://www.redhat.com/support/errata/RHSA-2003-368.html
http://www.redhat.com/support/errata/RHSA-2003-238.html
http://www.mandriva.com/security/advisories?name=MDKSA-2003:074
http://www.debian.org/security/2004/dsa-423