CVE-2017-12855
Vulnerability from cvelistv5
Published
2017-08-15 16:00
Modified
2024-08-05 18:51
Severity ?
Summary
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
cve@mitre.orghttp://www.debian.org/security/2017/dsa-3969
cve@mitre.orghttp://www.securityfocus.com/bid/100341Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1039177Third Party Advisory, VDB Entry
cve@mitre.orghttp://xenbits.xen.org/xsa/advisory-230.htmlVendor Advisory
cve@mitre.orghttps://support.citrix.com/article/CTX225941
Impacted products
n/an/a
Show details on NVD website

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