CVE-2014-7155
Description
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| suse | 12.3 | affected | |
| suse | 13.1 | affected | |
| fedora | 19 | affected | |
| fedora | 20 | affected | |
| debian | 7.0 | affected | |
| debian | bookworm | fixed | 4.4.1-3 |
| debian | bullseye | fixed | 4.4.1-3 |
| debian | forky | fixed | 4.4.1-3 |
| debian | sid | fixed | 4.4.1-3 |
| debian | trixie | fixed | 4.4.1-3 |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html
- http://secunia.com/advisories/61858
- http://secunia.com/advisories/61890
- http://security.gentoo.org/glsa/glsa-201412-42.xml
- http://support.citrix.com/article/CTX200218
- http://www.debian.org/security/2014/dsa-3041
- http://www.securityfocus.com/bid/70057
- http://www.securitytracker.com/id/1030888
- http://xenbits.xen.org/xsa/advisory-105.html
- https://security-tracker.debian.org/tracker/CVE-2014-7155
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.