KDE Screensaver Unlock Dialog Race Condition Lock Bypass Vulnerability

BID:38214

Info

KDE Screensaver Unlock Dialog Race Condition Lock Bypass Vulnerability

Bugtraq ID: 38214
Class: Race Condition Error
CVE:
Remote: No
Local: Yes
Published: Feb 12 2010 12:00AM
Updated: Feb 17 2010 06:02PM
Credit: Felix Lemke
Vulnerable: S.u.S.E. openSUSE 11.2
KDE KDE 4.4
Not Vulnerable:

Discussion

KDE Screensaver Unlock Dialog Race Condition Lock Bypass Vulnerability

The KDE screensaver application is prone to a vulnerability that allows an attacker who has physical console access to bypass the user's locked screen.

UPDATE (February 17, 2010): This issue affects the KRunner application used to perform password validation. Computers may be affected by this issue even when no screensaver is being used.

KDE 4.4.0 is vulnerable; other versions may also be affected.

Exploit / POC

KDE Screensaver Unlock Dialog Race Condition Lock Bypass Vulnerability

To exploit this issue, attackers require physical console access.

Solution / Fix

KDE Screensaver Unlock Dialog Race Condition Lock Bypass Vulnerability

Solution:
A sourcecode patch is available. Please see the references for more information.

References

KDE Screensaver Unlock Dialog Race Condition Lock Bypass Vulnerability

References:

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