Description
The IRQ setup in Xen 4.2.x and 4.3.x, when using device passthrough and configured to support a large number of CPUs, frees certain memory that may still be intended for use, which allows local guest administrators to cause a denial of service (memory corruption and hypervisor crash) and possibly execute arbitrary code via vectors related to an out-of-memory error that triggers a (1) use-after-free or (2) double free.
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 | 4.4.0-1 | — |
| Debian 13 | xen | 4.4.0-1 | — |
| Debian 12 | xen | 4.4.0-1 | — |
References
- SUSE-SU-2014:0373 vendor-advisory
- FEDORA-2014-1552 vendor-advisory
- xen-irq-cve20141642-code-exec(90649) vdb-entry
- 56557 third-party-advisory
- GLSA-201407-03 vendor-advisory
- FEDORA-2014-1559 vendor-advisory
- [oss-security] 20140123 Xen Security Advisory 83 (CVE-2014-1642) - Out-of-memory condition yielding memory corruption during IRQ setup mailing-list
- 102406 vdb-entry
- 1029679 vdb-entry
- 65097 vdb-entry
- http://xenbits.xen.org/xsa/advisory-83.html