Articles / Ubuntu: New gnome-screensav...

Ubuntu: New gnome-screensaver packages fix various security issues

It was discovered that gnome-screensaver did not correctly lock all screens when monitors get hotplugged. An attacker with physical access could use this flaw to gain access to a locked session. It was discovered that gnome-screensaver did not correctly handle keyboard grab when monitors get hotplugged. An attacker with physical access could use this flaw to gain access to a locked session. Updated packages are available from security.ubuntu.com.

===========================================================
Ubuntu Security Notice USN-907-1             March 08, 2010
gnome-screensaver vulnerabilities
CVE-2010-0285, CVE-2010-0422
===========================================================

A security issue affects the following Ubuntu releases:

Ubuntu 8.10
Ubuntu 9.04
Ubuntu 9.10

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 8.10:
 gnome-screensaver               2.24.0-0ubuntu2.1

Ubuntu 9.04:
 gnome-screensaver               2.24.0-0ubuntu6.1

Ubuntu 9.10:
 gnome-screensaver               2.28.0-0ubuntu3.5

After a standard system upgrade you need to restart your session to effect
the necessary changes.

Details follow:

It was discovered that gnome-screensaver did not correctly lock all screens
when monitors get hotplugged. An attacker with physical access could use
this flaw to gain access to a locked session. (CVE-2010-0285)

It was discovered that gnome-screensaver did not correctly handle keyboard
grab when monitors get hotplugged. An attacker with physical access could
use this flaw to gain access to a locked session. This issue only affected
Ubuntu 9.10. (CVE-2010-0422)


Updated packages for Ubuntu 8.10:

 Source archives:

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu2.1.diff.gz
     Size/MD5:     9612 6be699dcee9fece9c466a64e792cce73
   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu2.1.dsc
     Size/MD5:     1876 a01ab7300a5da151236e9a21916923e6
   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0.orig.tar.gz
     Size/MD5:  2351712 bc9a89cc8a146b88dd844a212f1d7b7c

 amd64 architecture (Athlon64, Opteron, EM64T Xeon):

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu2.1_amd64.deb
     Size/MD5:  1555572 7a7f89ace5e54f72090b7fcedb086db3

 i386 architecture (x86 compatible Intel/AMD):

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu2.1_i386.deb
     Size/MD5:  1538164 fa835001734e052ce9a11564efe56e03

 lpia architecture (Low Power Intel Architecture):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu2.1_lpia.deb
     Size/MD5:  1537264 a726d038c71545341afdb2a224c24905

 powerpc architecture (Apple Macintosh G3/G4/G5):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu2.1_powerpc.deb
     Size/MD5:  1563500 f8b0c692c4fc204599a727eb2c9624e6

 sparc architecture (Sun SPARC/UltraSPARC):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu2.1_sparc.deb
     Size/MD5:  1547504 91dd1e6cd5f574bda3cda18af09f3d49

Updated packages for Ubuntu 9.04:

 Source archives:

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu6.1.diff.gz
     Size/MD5:    11343 c73c5f68b94850272966c41dc2597353
   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu6.1.dsc
     Size/MD5:     1879 07c2b16b0109989db32c0334be335914
   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0.orig.tar.gz
     Size/MD5:  2351712 bc9a89cc8a146b88dd844a212f1d7b7c

 amd64 architecture (Athlon64, Opteron, EM64T Xeon):

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu6.1_amd64.deb
     Size/MD5:  1448284 8c6d47094ae8cb9c08a07cbfec8e4816

 i386 architecture (x86 compatible Intel/AMD):

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu6.1_i386.deb
     Size/MD5:  1431876 484dad84cabe56534c4b71ef41efd588

 lpia architecture (Low Power Intel Architecture):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu6.1_lpia.deb
     Size/MD5:  1431312 f8094316f1272daea3e3c1efd92902d4

 powerpc architecture (Apple Macintosh G3/G4/G5):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu6.1_powerpc.deb
     Size/MD5:  1457084 7182af1a4f434a7105b3e5b82a4dfa6f

 sparc architecture (Sun SPARC/UltraSPARC):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.24.0-0ubuntu6.1_sparc.deb
     Size/MD5:  1441116 0cb7171c755238f3e916594c664d3621

Updated packages for Ubuntu 9.10:

 Source archives:

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0-0ubuntu3.5.diff.gz
     Size/MD5:    15733 83ebe53647460755684705710e36e896
   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0-0ubuntu3.5.dsc
     Size/MD5:     1757 6009f51f8967671d5e19cfc31d6394e5
   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0.orig.tar.gz
     Size/MD5:  5069053 cdf328a0443a3cc30b4b2b36d9a99236

 amd64 architecture (Athlon64, Opteron, EM64T Xeon):

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0-0ubuntu3.5_amd64.deb
     Size/MD5:  4186276 0de4fd7dbe92652da6abb4a0da360ca7

 i386 architecture (x86 compatible Intel/AMD):

   http://security.ubuntu.com/ubuntu/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0-0ubuntu3.5_i386.deb
     Size/MD5:  4169778 806e2cea1aec193ce6eb8dd6b3f0b463

 lpia architecture (Low Power Intel Architecture):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0-0ubuntu3.5_lpia.deb
     Size/MD5:  4170634 dda9049c711b0344a92e8e0862fccbb1

 powerpc architecture (Apple Macintosh G3/G4/G5):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0-0ubuntu3.5_powerpc.deb
     Size/MD5:  4180178 ec0f991d3cebdf2d3d89a369acfa9536

 sparc architecture (Sun SPARC/UltraSPARC):

   http://ports.ubuntu.com/pool/main/g/gnome-screensaver/gnome-screensaver_2.28.0-0ubuntu3.5_sparc.deb
     Size/MD5:  4178644 a2c8b28772363b5cbda5c14865b8ed49
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