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Citrix XenServer Multiple Security Updates (CTX225941)

Information

Severity

Severity

High

Family

Family

Citrix Xenserver Local Security Checks

CVSSv2 Base

CVSSv2 Base

7.2

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

3 years ago

Summary

A number of security vulnerabilities have been identified in Citrix XenServer that may allow a malicious administrator of a guest VM to compromise the host: - CVE-2017-12134: (High) linux: Fix Xen block IO merge-ability calculation. - CVE-2017-12135: (Medium) multiple problems with transitive grants. - CVE-2017-12136: (High) grant_table: Race conditions with maptrack free list handling. - CVE-2017-12137: (High) x86: PV privilege escalation via map_grant_ref. - CVE-2017-12855: (Low) grant_table: possibly premature clearing of GTF_writing / GTF_reading.

Affected Software

Affected Software

XenServer versions 7.2, 7.1, 7.0, 6.5, 6.2.0, 6.0.2.

Detection Method

Detection Method

Check the installed hotfixes.

Solution

Solution

Apply the hotfix referenced in the advisory.

Common Vulnerabilities and Exposures (CVE)