Vulnerability in Citrix Xenserver
CVE-2017-12134
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
- Xen
Weakness classification (CWE)
References
- support.citrix.com/article/CTX225941 (Patch, Third Party Advisory)
- www.securitytracker.com/id/1039176 (VDB Entry, Third Party Advisory, vdb-entry)
- xenbits.xen.org/xsa/advisory-229.html (Patch, Mitigation, Vendor Advisory)
- www.debian.org/security/2017/dsa-3981 (vendor-advisory)
- usn.ubuntu.com/3655-1/ (vendor-advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Mitigation, Issue Tracking)
- security.gentoo.org/glsa/201801-14 (vendor-advisory)
- usn.ubuntu.com/3655-2/ (vendor-advisory)
- www.openwall.com/lists/oss-security/2017/08/15/4 (mailing-list, Mailing List, Third Party Advisory, Mitigation)
- www.securityfocus.com/bid/100343 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-12134?
- CVE-2017-12134 is a high-severity vulnerability in Citrix Xenserver, classified under Incorrect Calculation. CVSS score: 8.8/10. Published 2017-08-24.
- How severe is CVE-2017-12134?
- High severity. CVSS v3 base score is 8.8 out of 10.