Vulnerability Details : CVE-2015-7970
The p2m_pod_emergency_sweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service (CPU consumption and possibly reboot) via crafted memory contents that triggers a "time-consuming linear scan," related to Populate-on-Demand.
Vulnerability category: Denial of service
Products affected by CVE-2015-7970
- cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-7970
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 29 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-7970
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST |
CWE ids for CVE-2015-7970
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-7970
-
http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html
openSUSE-SU-2015:2250-1: moderate: Security update for xen
-
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html
[SECURITY] Fedora 21 Update: xen-4.4.3-7.fc21
-
http://xenbits.xen.org/xsa/advisory-150.html
XSA-150 - Xen Security AdvisoriesVendor Advisory
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http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html
[SECURITY] Fedora 23 Update: xen-4.5.1-14.fc23
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http://www.debian.org/security/2015/dsa-3414
Debian -- Security Information -- DSA-3414-1 xen
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http://www.securityfocus.com/bid/77362
Xen CVE-2015-7970 Local Denial of Service Vulnerability
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http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html
[SECURITY] Fedora 22 Update: xen-4.5.1-14.fc22
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http://support.citrix.com/article/CTX202404
Citrix XenServer Multiple Security Updates
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https://security.gentoo.org/glsa/201604-03
Xen: Multiple vulnerabilities (GLSA 201604-03) — Gentoo security
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http://www.securitytracker.com/id/1034034
Xen Populate-on-Demand Mode Memory Error Lets Local Users on a Guest System Cause Denial of Service Conditions on the Host System - SecurityTracker
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