Description
The HVMOP_inject_msi function in Xen 4.2.x, 4.3.x, and 4.4.x does not properly check the return value from the IRQ setup check, which allows local HVM guest administrators to cause a denial of service (NULL pointer dereference and crash) via unspecified vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xen | 4.4.1-1 | — |
| Debian 13 | xen | 4.4.1-1 | — |
| Debian 12 | xen | 4.4.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | xen | 4.4.0-0ubuntu5.1 | — |
References
- GLSA-201504-04 vendor-advisory
- http://xenbits.xen.org/xsa/advisory-96.html
- openSUSE-SU-2014:1281 vendor-advisory
- openSUSE-SU-2014:1279 vendor-advisory
- FEDORA-2014-7423 vendor-advisory
- FEDORA-2014-7408 vendor-advisory
- 1030322 vdb-entry
- 67794 vdb-entry
- [oss-security] 20140604 Re: Xen Security Advisory 96 - Vulnerabilities in HVM MSI injection mailing-list