CVE - CVE-2017-12855

CVE-ID
CVE-2017-12855	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BID:100341 URL:http://www.securityfocus.com/bid/100341 CONFIRM:http://xenbits.xen.org/xsa/advisory-230.html CONFIRM:https://support.citrix.com/article/CTX225941 DEBIAN:DSA-3969 URL:http://www.debian.org/security/2017/dsa-3969 SECTRACK:1039177 URL:http://www.securitytracker.com/id/1039177
Assigning CNA
MITRE Corporation
Date Record Created
20170815	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20170815)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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