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CVE-2013-1922

Publication date 15 April 2013

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

qemu-nbd in QEMU, as used in Xen 4.2.x, determines the format of a raw disk image based on the header, which allows local guest OS administrators to read arbitrary files on the host by modifying the header to identify a different format, which is used when the guest is restarted, a different vulnerability than CVE-2008-2004.

Read the notes from the security team

Status

Package Ubuntu Release Status
qemu 16.10 yakkety
Not affected
16.04 LTS xenial
Not affected
15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty
Not affected
13.10 saucy
Not affected
13.04 raring Ignored end of life
12.10 quantal Not in release
12.04 LTS precise Not in release
11.10 oneiric Not in release
10.04 LTS lucid Not in release
8.04 LTS hardy Ignored end of life
qemu-kvm 16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
13.10 saucy Not in release
13.04 raring Not in release
12.10 quantal Ignored end of life
12.04 LTS precise Ignored
11.10 oneiric Ignored end of life
10.04 LTS lucid Ignored end of life
8.04 LTS hardy Not in release

Notes

jdstrand

attack is: privileged attacker in the guest that uses a raw image writes data to beginning of device. Later, someone on the host uses qemu-nbd on the attacker-modified image. When the guest is rebooted, the attacker may have access to other files. On Ubuntu, the preferred virtualization management technology is libvirt. As of USN-1008-1, libvirt does not probe the disk format, which reduces this attack to a denial of server for the guest (ie, the attacker-modified image is not usable on reboot). TODO: review use in nova

mdeslaur

patch just introduced new --format option. Default behaviour is still to autodetect. Adding this new option doesn't fix the issue by itself, so marking as "low" We will not be fixing this issue in Ubuntu 12.04 LTS.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
qemu
qemu-kvm