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Debian Security Advisory DSA 4131-1 (xen - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.1

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

3 years ago

Summary

Multiple vulnerabilities have been discovered in the Xen hypervisor: CVE-2018-7540 Jann Horn discovered that missing checks in page table freeing may result in denial of service. CVE-2018-7541 Jan Beulich discovered that incorrect error handling in grant table checks may result in guest-to-host denial of service and potentially privilege escalation. CVE-2018-7542 Ian Jackson discovered that insufficient handling of x86 PVH guests without local APICs may result in guest-to-host denial of service.

Affected Software

Affected Software

xen on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

For the stable distribution (stretch), these problems have been fixed in version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5. We recommend that you upgrade your xen packages. For the detailed security status of xen please refer to its security tracker page linked in the references.

Common Vulnerabilities and Exposures (CVE)