[SECURITY] [DSA 1907-1] New kvm packages fix several vulnerabilities

ID DEBIAN:DSA-1907-1:40853
Type debian
Reporter Debian
Modified 2009-10-13T08:31:16


Debian Security Advisory DSA-1907-1 security@debian.org http://www.debian.org/security/ Giuseppe Iuculano October 13, 2009 http://www.debian.org/security/faq

Package : kvm Vulnerability : several vulnerabilities Problem type : local (remote) Debian-specific: no Debian bugs : 509997 548975 CVE Ids : CVE-2008-5714 CVE-2009-3290

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


Chris Webb discovered an off-by-one bug limiting KVM's VNC passwords to 7 characters. This flaw might make it easier for remote attackers to guess the VNC password, which is limited to seven characters where eight was intended.


It was discovered that the kvm_emulate_hypercall function in KVM does not prevent access to MMU hypercalls from ring 0, which allows local guest OS users to cause a denial of service (guest kernel crash) and read or write guest kernel memory.

For the stable distribution (lenny), these problems have been fixed in version 72+dfsg-5~lenny3.

The oldstable distribution (etch) does not contain kvm.

For the testing distribution (squeeze) these problems will be fixed soon.

For the unstable distribution (sid) these problems have been fixed in version 85+dfsg-4.1

We recommend that you upgrade your kvm packages.

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

Debian (stable)

Stable updates are available for alpha, amd64, arm, armel, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc.

Source archives:

http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny3.dsc Size/MD5 checksum: 1349 da207d5f42ab45ed3956be5fcb6ad685 http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny3.diff.gz Size/MD5 checksum: 41138 f28b640e60392636399873e99b6cc5e3 http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg.orig.tar.gz Size/MD5 checksum: 3250251 899a66ae2ea94e994e06f637e1afef4a

Architecture independent packages:

http://security.debian.org/pool/updates/main/k/kvm/kvm-source_72+dfsg-5~lenny3_all.deb Size/MD5 checksum: 158242 8cee5a68dadbbceecdac6330b69fa59f

amd64 architecture (AMD x86_64 (AMD64))

http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny3_amd64.deb Size/MD5 checksum: 1099546 5009415dc4927800b33249ca31d8a651

i386 architecture (Intel ia32)

http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny3_i386.deb Size/MD5 checksum: 1030530 313f1a0d91889bf167c4e1aaf57a027d

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>