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Citrix XenServer Multiple Security Updates (CTX225941)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
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.