Description
Xen 4.2.x, 4.1.x, and earlier, when the hypervisor is running "under memory pressure" and the Xen Security Module (XSM) is enabled, uses the wrong ordering of operations when extending the per-domain event channel tracking table, which causes a use-after-free and allows local guest kernels to inject arbitrary events and gain privileges via unspecified vectors.
References
- SUSE-SU-2014:0470 vendor-advisory
- 55082 third-party-advisory
- GLSA-201309-24 vendor-advisory
- [Xen-announce] 20130404 Xen Security Advisory 47 (CVE-2013-1920) - Potential use of freed memory in event channel operations mailing-list
- 92050 vdb-entry
- xen-cve20131920-code-exec(83226) vdb-entry
- openSUSE-SU-2013:0912 vendor-advisory
- 52857 third-party-advisory
- 58880 vdb-entry
- SUSE-SU-2014:0446 vendor-advisory
- SUSE-SU-2014:0411 vendor-advisory
- 1028388 vdb-entry
- [oss-security] 20130404 Xen Security Advisory 47 (CVE-2013-1920) - Potential use of freed memory in event channel operations mailing-list