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Bug 1050745 - (CVE-2013-7273) CVE-2013-7273 gdm: local DoS possible when cancelling and disable-user-list=true when fallback greeter is used
CVE-2013-7273 gdm: local DoS possible when cancelling and disable-user-list=t...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20120730,reported=2...
: Security
Depends On: 1050746 1050747
Blocks:
  Show dependency tree / graph
 
Reported: 2014-01-08 20:22 EST by Vincent Danen
Modified: 2015-07-29 13:54 EDT (History)
1 user (show)

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Doc Type: Bug Fix
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Description Vincent Danen 2014-01-08 20:22:04 EST 
It was reported [1],[2] that when the fallback greeter is used in GDM3.x, if the disable-user-list setting is "true" (so a user list is not displayed, but entry fields for username and password), if a user enters their username and are then presented with a password prompt, if they were to click the "cancel" button then all of the user-interactive fields disappear.  The user is then unable to login in or otherwise interact with the display manager, and must either kill X or reboot.

There is no upstream fix as of yet.  CVE-2013-7273 was assigned [3] to this issue.


[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=683338
[2] https://bugzilla.gnome.org/show_bug.cgi?id=704284
[3] http://seclists.org/oss-sec/2014/q1/40
Comment 2 Vincent Danen 2014-01-08 20:22:59 EST 
Created gdm tracking bugs for this issue:

Affects: fedora-all [bug 1050746]
Comment 3 Vincent Danen 2014-01-08 20:26:36 EST 
This does not affect gdm 2.x.
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