Todd Miller Sudo Kerberos Authentication Local Authentication Bypass Weakness

BID:24368

Info

Todd Miller Sudo Kerberos Authentication Local Authentication Bypass Weakness

Bugtraq ID: 24368
Class: Design Error
CVE: CVE-2007-3149
Remote: No
Local: Yes
Published: Jun 07 2007 12:00AM
Updated: May 07 2015 05:37PM
Credit: Thor Lancelot Simon is credited with the discovery of this vulnerability.
Vulnerable: Todd Miller Sudo 1.6.8 p12
Not Vulnerable:

Discussion

Todd Miller Sudo Kerberos Authentication Local Authentication Bypass Weakness

The 'sudo' utility is prone to a local authentication-bypass weakness when used in conjunction with Kerberos. Attackers must first gain local, interactive access to a computer running 'sudo' configured to authenticate via Kerberos. They may do this by exploiting other latent vulnerabilities.

Successfully exploiting this issue allows local attackers to bypass sudo's authentication prompt, allowing them to perform actions that are granted to users via the 'sudoers' file.

This issue affects 'sudo' 1.6.8p12; other versions may also be affected.

Exploit / POC

Todd Miller Sudo Kerberos Authentication Local Authentication Bypass Weakness

To exploit this issue, attackers use the affected 'sudo' utility itself, along with a fake KDC.

Solution / Fix

Todd Miller Sudo Kerberos Authentication Local Authentication Bypass Weakness

Solution:
The vendor has committed a fix to the 'sudo' CVS repository as of June 7, 2007. Please see the references for more information.

References

Todd Miller Sudo Kerberos Authentication Local Authentication Bypass Weakness

References:
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