Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Tue, 11 Jun 2013 16:47:40 -0700
From: Alan Coopersmith <>
CC: "X.Org Security Team" <>,,
        "X.Org Development" <>
Subject: CVE request for possible NULL ptr deref in XDM when using crypt()
 from glibc 2.17+

It's been suggested we get a CVE id assigned for this recent fix to the xdm
display/login manager from X.Org:

Without this fix, if xdm is built to use raw crypt() authentication, instead
of a higher level system such as PAM or BSD Auth, and that crypt() function
can return a NULL pointer (as glibc 2.17+ does for invalid input, such as
when an account is locked by prepending a "!" to the password field), then
attempting to login to such an account via xdm can crash the xdm daemon.

For single user console machines, this generally just means you get the 
text console login prompt instead.   For machines set up to support multiple
seats, remote XDMCP access, or X terminals (such as LTSP setups using xdm),
this may be a denial of service for users on those other seats/terminals

	-Alan Coopersmith-    
	 Oracle Solaris Engineering -

Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.