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


0.0
high

Snyk CVSS

    Attack Complexity Low
    Privileges Required High
    Scope Changed
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.1% (41st percentile)
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NVD
8.2 high

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  • Snyk ID SNYK-ALPINE314-XEN-1308632
  • published 21 Jul 2020
  • disclosed 4 Apr 2017

How to fix?

Upgrade Alpine:3.14 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:3.14 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.