public via NVD CVE DB

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2007-3149

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."


Hyperlink:http://www.sudo.ws/cgi-bin/cvsweb/sudo/auth/kerb5.c
Hyperlink:http://www.securityfocus.com/bid/24368

Name: 20070607 Re: Sudo: local root compromise with krb5 enabled
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/470774/100/0/threaded

Name: 20070607 MIT krb5: makes sudo authentication issue MUCH worse.
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/470752/100/0/threaded

Name: 20070607 Sudo: local root compromise with krb5 enabled
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/470739/100/0/threaded

Name: 26540
Hyperlink:http://secunia.com/advisories/26540