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CVE-2017-14318

6.5 · MEDIUM

An issue was discovered in Xen 4.5.x through 4.9.x.

Published Sep 12, 2017CWE-476EPSS 0.42%

Overview

CVE-2017-14318 is a medium-severity vulnerability. It was published on September 12, 2017 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/100817Refwww.securitytracker.com/id/1039349Refxenbits.xen.org/xsa/advisory-232.htmlRefsupport.citrix.com/article/CTX227185Refwww.debian.org/security/2017/dsa-4050Refwww.securityfocus.com/bid/100817Refwww.securitytracker.com/id/1039349Refxenbits.xen.org/xsa/advisory-232.htmlRefsupport.citrix.com/article/CTX227185Refwww.debian.org/security/2017/dsa-4050

How CyberStrike helps

Frequently asked questions

What is CVE-2017-14318?

CVE-2017-14318 is a medium-severity vulnerability. It was published on September 12, 2017 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2017-14318?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-14318?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-14318?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-14318 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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