A vulnerability was found in Xen 4.6.x/4.7.x/4.8.x/4.9.x/4.10.x (Virtualization Software). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component libxl. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect integrity, and availability.

The weakness was released 06/27/2018 as XSA-266 as confirmed security advisory (Website). The advisory is shared at xenbits.xen.org. This vulnerability is known as CVE-2018-12892. An attack has to be approached locally. The successful exploitation needs a single authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 176419 (Debian Security Update for xen (DSA 4236-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xen.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityTracker (ID 1041203†). Entry connected to this vulnerability is available at VDB-120147.

Productinfo

Type

• Virtualization Software

Name

• Xen

Version

• 4.6.x
• 4.7.x
• 4.8.x
• 4.9.x
• 4.10.x

License

• open-source

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CPE 2.2info

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