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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.50% probability · 41th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-682
- Affected
- xen/xen · citrix/xenserver
- Source
- cve@mitre.org
References
- http://www.debian.org/security/2017/dsa-3981
- http://www.openwall.com/lists/oss-security/2017/08/15/4Mailing List, Mitigation, Third Party Advisory
- http://www.securityfocus.com/bid/100343Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039176Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-229.htmlMitigation, Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1477656Issue Tracking, Mitigation, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201801-14
- https://support.citrix.com/article/CTX225941Patch, Third Party Advisory
- https://usn.ubuntu.com/3655-1/
- https://usn.ubuntu.com/3655-2/
- http://www.debian.org/security/2017/dsa-3981
- http://www.openwall.com/lists/oss-security/2017/08/15/4Mailing List, Mitigation, Third Party Advisory
- http://www.securityfocus.com/bid/100343Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039176Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-229.htmlMitigation, Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1477656Issue Tracking, Mitigation, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201801-14
- https://support.citrix.com/article/CTX225941Patch, Third Party Advisory
- https://usn.ubuntu.com/3655-1/
- https://usn.ubuntu.com/3655-2/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.