Articles / Debian: New kvm packages fi…

Debian: New kvm packages fix denial of service

Matt T. Yourst discovered an issue in the kvm subsystem. Local users with permission to manipulate /dev/kvm can cause a denial of service (hang) by providing an invalid cr3 value to the KVMSETSREGS call. Updated packages are available from security.debian.org.

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- ------------------------------------------------------------------------
Debian Security Advisory DSA-1846-1                  security@debian.org
http://www.debian.org/security/                             Dann Frazier
July 28, 2009                         http://www.debian.org/security/faq
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Package        : kvm
Vulnerability  : denial of service
Problem type   : local
Debian-specific: no
CVE Id(s)      : CVE-2009-2287

Matt T. Yourst discovered an issue in the kvm subsystem. Local
users with permission to manipulate /dev/kvm can cause a denial
of service (hang) by providing an invalid cr3 value to the
KVM_SET_SREGS call.

For the stable distribution (lenny), these problems have been fixed
in version 72+dfsg-5~lenny2.

For the unstable distribution (sid), these problems will be fixed soon.

We recommend that you upgrade your kvm packages, and rebuild any kernel
modules you have built from a kvm-source package version.

Upgrade instructions
- --------------------

wget url
       will fetch the file for you
dpkg -i file.deb
       will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
       will update the internal database
apt-get upgrade
       will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 5.0 alias lenny
- --------------------------------

Stable updates are available for amd64 and i386.

Source archives:

 http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg.orig.tar.gz
   Size/MD5 checksum:  3250251 899a66ae2ea94e994e06f637e1afef4a
 http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny2.dsc
   Size/MD5 checksum:     1340 e95d1e3129dd6eb2d7b139504a8682d5
 http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny2.diff.gz
   Size/MD5 checksum:    40508 22d3f4b490752c1db13affc506896f59

Architecture independent packages:

 http://security.debian.org/pool/updates/main/k/kvm/kvm-source_72+dfsg-5~lenny2_all.deb
   Size/MD5 checksum:   157856 593b7d018dc15553d1c690c941ff0dd7

amd64 architecture (AMD x86_64 (AMD64))

 http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny2_amd64.deb
   Size/MD5 checksum:  1105650 e29a433d9d83be7bf22dfb8297e3b63f

i386 architecture (Intel ia32)

 http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny2_i386.deb
   Size/MD5 checksum:  1034054 39113a71cf5fdbafcaed9f3f58ae2369


 These files will probably be moved into the stable distribution on
 its next update.

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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