Improper Validation of Array Index Affecting xen package, versions <4.7.2-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.11% (44th percentile)

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  • Snyk IDSNYK-ALPINE316-XEN-2844962
  • published21 Jul 2020
  • disclosed4 Apr 2017

Introduced: 4 Apr 2017

CVE-2017-7228  (opens in a new tab)
CWE-129  (opens in a new tab)

How to fix?

Upgrade Alpine:3.16 xen to version 4.7.2-r0 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 Alpine. See How to fix? for Alpine:3.16 relevant fixed versions and status.

An issue (known as XSA-212) was discovered in Xen, with fixes available for 4.8.x, 4.7.x, 4.6.x, 4.5.x, and 4.4.x. The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input, allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.