CVEvulnerability

CVE-2017-12855

6.5 MEDIUM Published 2017-08-15 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2017-08-15
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
6.5 MEDIUM — CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS 2.0 ([email protected])
2.1 LOW — AV:L/AC:L/Au:N/C:P/I:N/A:N
Weaknesses
CWE-200

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.

Affected configurations

• xen xen 4.5.0 • xen xen 4.5.1 • xen xen 4.5.2 • xen xen 4.5.3 • xen xen 4.5.5 • xen xen 4.6.0 • xen xen 4.6.1 • xen xen 4.6.3 • xen xen 4.6.4 • xen xen 4.6.5 • xen xen 4.6.6 • xen xen 4.7.0 • xen xen 4.7.1 • xen xen 4.7.2 • xen xen 4.7.3 • xen xen 4.8.0 • xen xen 4.8.1 • xen xen 4.9.0

Related

Weakness · CWE (1)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness

References