I am pleased to announce the release of Xen 4.2.3. This is available immediately from its git repository xenbits.xen.org (tag RELEASE-4.2.3) or from the Xen Project download pages.
This release fixes the following critical vulnerabilities:
- CVE-2013-1918 / XSA-45: Several long latency operations are not preemptible
- CVE-2013-1952 / XSA-49: VT-d interrupt remapping source validation flaw for bridges
- CVE-2013-2076 / XSA-52: Information leak on XSAVE/XRSTOR capable AMD CPUs
- CVE-2013-2077 / XSA-53: Hypervisor crash due to missing exception recovery on XRSTOR
- CVE-2013-2078 / XSA-54: Hypervisor crash due to missing exception recovery on XSETBV
- CVE-2013-2194, CVE-2013-2195, CVE-2013-2196 / XSA-55: Multiple vulnerabilities in libelf PV kernel handling
- CVE-2013-2072 / XSA-56: Buffer overflow in xencontrol Python bindings affecting xend
- CVE-2013-2211 / XSA-57: libxl allows guest write access to sensitive console related xenstore keys
- CVE-2013-1432 / XSA-58: Page reference counting error due to XSA-45/CVE-2013-1918 fixes
- XSA-61: libxl partially sets up HVM passthrough even with disabled iommu
The following minor vulnerability is also being addressed:
- CVE-2013-2007 / XSA-51: qemu guest agent (qga) insecure file permissions
We recommend all users of the 4.2 stable series to update to this latest point release. Among many bug fixes and improvements:
- addressing a regression from the fix for XSA-46
- bug fixes to low level system state handling, including certain hardware errata workarounds
