CVE-2017-12134

moderate-risk
Published 2017-08-24

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.

Do I need to act?

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0.34% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
LOCAL / LOW complexity

Affected Products (7)

Xen

Affected Vendors

Xen Citrix

References (20)

http://www.debian.org/security/2017/dsa-3981
Mailing List http://www.openwall.com/lists/oss-security/2017/08/15/4
Third Party Advisory http://www.securityfocus.com/bid/100343
Third Party Advisory http://www.securitytracker.com/id/1039176
Mitigation http://xenbits.xen.org/xsa/advisory-229.html
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1477656
https://security.gentoo.org/glsa/201801-14
Patch https://support.citrix.com/article/CTX225941
https://usn.ubuntu.com/3655-1/
https://usn.ubuntu.com/3655-2/
http://www.debian.org/security/2017/dsa-3981
Mailing List http://www.openwall.com/lists/oss-security/2017/08/15/4
Third Party Advisory http://www.securityfocus.com/bid/100343
Third Party Advisory http://www.securitytracker.com/id/1039176
Mitigation http://xenbits.xen.org/xsa/advisory-229.html
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1477656
https://security.gentoo.org/glsa/201801-14
Patch https://support.citrix.com/article/CTX225941
https://usn.ubuntu.com/3655-1/
https://usn.ubuntu.com/3655-2/
42
/ 100
moderate-risk
Severity 27/34 · High
Exploitability 1/34 · Minimal
Exposure 14/34 · Moderate