Vulnerability in Citrix Xenserver
CVE-2017-12136
Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service (free list corruption and host crash) or gain privileges on the host via vectors involving maptrack free list handling.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (21.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
- Xen — versions 4.6.0, 4.6.1, 4.6.3
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
References
- support.citrix.com/article/CTX225941 (Patch, Third Party Advisory)
- xenbits.xen.org/xsa/advisory-228.html (Patch, Vendor Advisory)
- www.securityfocus.com/bid/100346 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3969 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2017/08/15/3 (mailing-list, Patch, Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- security.gentoo.org/glsa/201801-14 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1039175 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-12136?
- CVE-2017-12136 is a high-severity vulnerability in Citrix Xenserver, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.8/10. Published 2017-08-24.
- How severe is CVE-2017-12136?
- High severity. CVSS v3 base score is 7.8 out of 10.