Out-of-Bounds Affecting xen package, versions <4.18.0-r2
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Test your applications- Snyk ID SNYK-ALPINE320-XEN-7012720
- published 23 May 2024
- disclosed 5 Jan 2024
Introduced: 5 Jan 2024
CVE-2023-46837 Open this link in a new tabHow to fix?
Upgrade Alpine:3.20 xen to version 4.18.0-r2 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:3.20 relevant fixed versions and status.
Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest.
Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory.
This undefined behavior was meant to be addressed by XSA-437, but the approach was not sufficient.
References
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JFVKWYQFRUU3CAS53THTUKXEOUDWI42G/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XLL6SQ6IKFYXLYWITYZCRV5IBRK5G35R/
- https://xenbits.xenproject.org/xsa/advisory-447.html