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Vulnerability Details : CVE-2017-14318

An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
Publish Date : 2017-09-12 Last Update Date : 2017-11-29
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
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)
CWE ID 476

- Products Affected By CVE-2017-14318

# 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-2017-14318
SECTRACK 1039349
BID 100817 Xen 'grant_table.c' Privilege Escalation Vulnerability Release Date:2017-09-15

- Metasploit Modules Related To CVE-2017-14318

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

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