Description
sudo, when linked with MIT Kerberos 5 (krb5), does not properly check whether a user can currently authenticate to Kerberos, which allows local users to gain privileges, in a manner unintended by the sudo security model, via certain KRB5_ environment variable settings. NOTE: another researcher disputes this vulnerability, stating that the attacker must be "a user, who can already log into your system, and can already use sudo."
References
- 24368 vdb-entry
- http://www.sudo.ws/cgi-bin/cvsweb/sudo/auth/kerb5.c
- 20070607 MIT krb5: makes sudo authentication issue MUCH worse. mailing-list
- 20070607 Sudo: local root compromise with krb5 enabled mailing-list
- 26540 third-party-advisory
- 20070607 Re: Sudo: local root compromise with krb5 enabled mailing-list