CVE-2017-10916
The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions (MPX) and Protection Key (PKU) features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions (MPX) and Protection Key (PKU) features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.35% probability · 70th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- xen/xen
- Source
- cve@mitre.org
References
- http://www.debian.org/security/2017/dsa-3969
- http://www.securityfocus.com/bid/99167
- http://www.securitytracker.com/id/1038730
- https://security.gentoo.org/glsa/201708-03
- https://xenbits.xen.org/xsa/advisory-220.htmlMailing List, Mitigation, Vendor Advisory
- http://www.debian.org/security/2017/dsa-3969
- http://www.securityfocus.com/bid/99167
- http://www.securitytracker.com/id/1038730
- https://security.gentoo.org/glsa/201708-03
- https://xenbits.xen.org/xsa/advisory-220.htmlMailing List, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.