DSA-2010-1: New kvm packages fix several vulnerabilities
Posted on: 03/10/2010 07:25 PM

The Debian Security Team published a new security update for Debian GNU/Linux. Here the announcement:

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Debian Security Advisory DSA-2010 security@debian.org
http://www.debian.org/security/ Dann Frazier
March 10, 2010 http://www.debian.org/security/faq
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Package : kvm
Vulnerability : privilege escalation/denial of service
Problem type : local
Debian-specific: no
CVE Id(s) : CVE-2010-0298 CVE-2010-0306 CVE-2010-0309 CVE-2010-0419

Several local vulnerabilities have been discovered in kvm, a full
virtualization system. The Common Vulnerabilities and Exposures project
identifies the following problems:

CVE-2010-0298 CVE-2010-0306

Gleb Natapov discovered issues in the KVM subsystem where missing
permission checks (CPL/IOPL) permit a user in a guest system to
denial of service a guest (system crash) or gain escalated
privileges with the guest.

CVE-2010-0309

Marcelo Tosatti fixed an issue in the PIT emulation code in the
KVM subsystem that allows privileged users in a guest domain to
cause a denial of service (crash) of the host system.

CVE-2010-0419

Paolo Bonzini found a bug in KVM that can be used to bypass proper
permission checking while loading segment selectors. This
potentially allows privileged guest users to execute privileged
instructions on the host system.

For the stable distribution (lenny), this problem has been fixed in
version 72+dfsg-5~lenny5.

For the testing distribution (squeeze), and the unstable distribution (sid),
these problems will be addressed within the linux-2.6 package.

We recommend that you upgrade your kvm package.

Upgrade instructions
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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
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Debian (stable)
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Stable updates are available for amd64 and i386.

Source archives:

http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny5.dsc
Size/MD5 checksum: 1341 14718fcd8584519702b567233d31abd6
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~lenny5.diff.gz
Size/MD5 checksum: 51204 40d0b0ba8df5fbd8cfc0c837b0da4db2

Architecture independent packages:

http://security.debian.org/pool/updates/main/k/kvm/kvm-source_72+dfsg-5~lenny5_all.deb
Size/MD5 checksum: 159990 7a50d4ad7242107fa3443fcf6a30197d

amd64 architecture (AMD x86_64 (AMD64))

http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny5_amd64.deb
Size/MD5 checksum: 1110560 df3bcd5f384fc054863dac9947f60ddb

i386 architecture (Intel ia32)

http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny5_i386.deb
Size/MD5 checksum: 1034558 4f74cdb89f87634ef7c44c2a2d488a1a


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

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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 lt;pkggt;' and http://packages.debian.org/lt;pkggt;
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