Veracode Vulnerability DatabaseVERACODE:32030Denial Of Service (DoS)
0.0004 Low
EPSS
Percentile
14.2%
xen:edge is vulnerable to denial of service. The majority of such pages remain allocated / associated with a guest for its entire lifetime. Grant table v2 status pages, however, are de-allocated when a guest switches (back) from v2 to v1. Freeing such pages requires that the hypervisor enforce that no parallel request can result in the addition of a mapping of such a page to a guest. That enforcement was missing, allowing guests to retain access to pages that were freed and perhaps re-used for other purposes. Unfortunately, when XSA-379 was being prepared, this similar issue was not noticed.
References
www.openwall.com/lists/oss-security/2021/09/08/2
xenbits.xen.org/xsa/advisory-384.html
lists.fedoraproject.org/archives/list/[email protected]/message/3HEHUIUWSSMCQGQY3GWX4J2SZGYP5W2Z/
lists.fedoraproject.org/archives/list/[email protected]/message/CEHZLIR5DFYYQBH55AERWHLO54OFU42C/
lists.fedoraproject.org/archives/list/[email protected]/message/L4MI3MQAPGILCLXBGQWPZHGE3ALSO4ZU/
secdb.alpinelinux.org/edge/main.yaml
secdb.alpinelinux.org/v3.11/main.yaml
secdb.alpinelinux.org/v3.12/main.yaml
secdb.alpinelinux.org/v3.13/main.yaml
secdb.alpinelinux.org/v3.14/main.yaml
security.gentoo.org/glsa/202208-23
www.debian.org/security/2021/dsa-4977
xenbits.xenproject.org/xsa/advisory-384.txt
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