CVE-2011-1751

Publication date 29 May 2011

Last updated 24 July 2024

Ubuntu priority

The pciej_write function in hw/acpi_piix4.c in the PIIX4 Power Management emulation in qemu-kvm does not check if a device is hotpluggable before unplugging the PCI-ISA bridge, which allows privileged guest users to cause a denial of service (guest crash) and possibly execute arbitrary code by sending a crafted value to the 0xae08 (PCI_EJ_BASE) I/O port, which leads to a use-after-free related to "active qemu timers."

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu-kvm	11.04 natty	Fixed 0.14.0+noroms-0ubuntu4.1
	10.10 maverick	Fixed 0.12.5+noroms-0ubuntu7.5
	10.04 LTS lucid	Fixed 0.12.3+noroms-0ubuntu9.9
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release

Notes

jdstrand

patch requires several other patches to be applied first adding apparmor tag since qemu-kvm is typically used with libvirt on Ubuntu, and is therefore confined by AppArmor

Patch details

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

Package	Patch details
qemu-kvm	Other: http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html Vendor: http://www.debian.org/security/2011/dsa-2241 Vendor: https://rhn.redhat.com/errata/RHSA-2011-0534.html

References

Related Ubuntu Security Notices (USN)