KDM allows logins without password under certain circumstances allowing a local user to gain elevated privileges.
|Package||kde-base/kdm on all architectures|
|Affected versions||< 3.5.7-r2|
|Unaffected versions||>= 3.5.7-r2|
|Package||kde-base/kdebase on all architectures|
|Affected versions||< 3.5.7-r4|
|Unaffected versions||>= 3.5.7-r4|
KDM is the Display Manager for the graphical desktop environment KDE. It is part of the kdebase package.
Kees Huijgen discovered an error when checking the credentials which can lead to a login without specifying a password. This only occurs when auto login is configured for at least one user and a password is required to shut down the machine.
A local attacker could gain root privileges and execute arbitrary commands by logging in as root without specifying root's password.
There is no known workaround at this time.
All KDM users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=kde-base/kdm-3.5.7-r2"
All kdebase users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=kde-base/kdebase-3.5.7-r4"
October 14, 2007
October 14, 2007: 01