Ubuntu: gnome-screensaver vulnerability

    Date23 Oct 2007
    CategoryUbuntu
    4252
    Posted ByLinuxSecurity Advisories
    Jens Askengren discovered that gnome-screensaver became confused when running under Compiz, and could lose keyboard lock focus. A local attacker could exploit this to bypass the user's locked screen saver.
    =========================================================== 
    Ubuntu Security Notice USN-537-1           October 23, 2007
    gnome-screensaver vulnerability
    CVE-2007-3920
    ===========================================================
    
    A security issue affects the following Ubuntu releases:
    
    Ubuntu 7.10
    
    This advisory also applies to the corresponding versions of
    Kubuntu, Edubuntu, and Xubuntu.
    
    The problem can be corrected by upgrading your system to the
    following package versions:
    
    Ubuntu 7.10:
      gnome-screensaver               2.20.0-0ubuntu4.2
    
    After a standard system upgrade you need to restart your session to affect
    the necessary changes.
    
    Details follow:
    
    Jens Askengren discovered that gnome-screensaver became confused when
    running under Compiz, and could lose keyboard lock focus.  A local
    attacker could exploit this to bypass the user's locked screen saver.
    
    
    Updated packages for Ubuntu 7.10:
    
      Source archives:
    
        http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.20.0-0ubuntu4.2.diff.gz
          Size/MD5:    22567 59f266ec6eb94b6a903e19b0ba0ddc0a
        http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.20.0-0ubuntu4.2.dsc
          Size/MD5:     1245 7a751fbd47821da72e6a980027a48011
        http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.20.0.orig.tar.gz
          Size/MD5:  2320018 db71d89c66fa3a96b3b276403b5bb723
    
      amd64 architecture (Athlon64, Opteron, EM64T Xeon):
    
        http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.20.0-0ubuntu4.2_amd64.deb
          Size/MD5:  1587250 2fdaaea4518774413cc48137d5f71f70
    
      i386 architecture (x86 compatible Intel/AMD):
    
        http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.20.0-0ubuntu4.2_i386.deb
          Size/MD5:  1570186 93d6f27e6334ae4022234d3fd165ade9
    
      powerpc architecture (Apple Macintosh G3/G4/G5):
    
        http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.20.0-0ubuntu4.2_powerpc.deb
          Size/MD5:  1605514 edeb052d5d0ccaa97085fd69f6b4f25a
    
      sparc architecture (Sun SPARC/UltraSPARC):
    
        http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.20.0-0ubuntu4.2_sparc.deb
          Size/MD5:  1576650 9eaac4a063ae54792d052590c9bc4bc1
    
    
    
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