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Vulnerability Details : CVE-2017-12855

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.
Publish Date : 2017-08-15 Last Update Date : 2017-11-15
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Obtain Information
CWE ID 200

- Products Affected By CVE-2017-12855

# Product Type Vendor Product Version Update Edition Language
1 OS XEN XEN 4.5.0 * * * Version Details Vulnerabilities
2 OS XEN XEN 4.5.1 * * * Version Details Vulnerabilities
3 OS XEN XEN 4.5.2 * * * Version Details Vulnerabilities
4 OS XEN XEN 4.5.3 * * * Version Details Vulnerabilities
5 OS XEN XEN 4.5.5 * * * Version Details Vulnerabilities
6 OS XEN XEN 4.6.0 * * * Version Details Vulnerabilities
7 OS XEN XEN 4.6.1 * * * Version Details Vulnerabilities
8 OS XEN XEN 4.6.3 * * * Version Details Vulnerabilities
9 OS XEN XEN 4.6.4 * * * Version Details Vulnerabilities
10 OS XEN XEN 4.6.5 * * * Version Details Vulnerabilities
11 OS XEN XEN 4.6.6 * * * Version Details Vulnerabilities
12 OS XEN XEN 4.7.0 * * * Version Details Vulnerabilities
13 OS XEN XEN 4.7.1 * * * Version Details Vulnerabilities
14 OS XEN XEN 4.7.2 * * * Version Details Vulnerabilities
15 OS XEN XEN 4.7.3 * * * Version Details Vulnerabilities
16 OS XEN XEN 4.8.0 * * * Version Details Vulnerabilities
17 OS XEN XEN 4.8.1 * * * Version Details Vulnerabilities
18 OS XEN XEN 4.9.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions

- References For CVE-2017-12855
SECTRACK 1039177
BID 100341 Xen CVE-2017-12855 Local Information Disclosure Vulnerability Release Date:2017-08-15 CONFIRM

- Metasploit Modules Related To CVE-2017-12855

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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