CVE-2017-10920

Impact:
Important
Public Date:
2017-06-20
Bugzilla:
1458878: CVE-2017-10920 CVE-2017-10921 CVE-2017-10922 xsa224 xen: grant table operations mishandle reference counts (XSA-224)

The MITRE CVE dictionary describes this issue as:

The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1.

Find out more about CVE-2017-10920 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 8.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity Impact High
Availability Impact High

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 xen Will not fix

Acknowledgements

Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Jan Beulich (SUSE) as the original reporter.

Mitigation

Running only HVM guests will avoid this vulnerability.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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