Kerberos 5 su (k5su) in FreeBSD 4.4 and earlier relies on the getlogin system call to determine if the user running k5su is root, which could allow a root-initiated process to regain its privileges after it has dropped them.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Heimdal | Freebsd | 0.4e (including) | 0.4e (including) |
| Heimdal | Kth | 0.4e (including) | 0.4e (including) |
References
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:07.k5su.asc
- http://www.iss.net/security_center/static/7956.php
- http://www.securityfocus.com/bid/3919
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:07.k5su.asc
- http://www.iss.net/security_center/static/7956.php
- http://www.securityfocus.com/bid/3919