Improper Input Validation Affecting xen package, versions <4.4.1-4


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.6% (80th percentile)

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  • Snyk IDSNYK-DEBIAN9-XEN-366989
  • published19 Nov 2014
  • disclosed19 Nov 2014

Introduced: 19 Nov 2014

CVE-2014-8594  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Debian:9 xen to version 4.4.1-4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging (HAP).

CVSS Scores

version 3.1