CVE - CVE-2020-29481

CVE-ID
CVE-2020-29481	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes from the previous domain(s) with the same domid. Because all Xenstore entries of a guest below /local/domain/<domid> are being deleted by Xen tools when a guest is destroyed, only Xenstore entries of other guests still running are affected. For example, a newly created guest domain might be able to read sensitive information that had belonged to a previously existing guest domain. Both Xenstore implementations (C and Ocaml) are vulnerable.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
DEBIAN:DSA-4812 URL:https://www.debian.org/security/2020/dsa-4812 FEDORA:FEDORA-2020-64859a826b URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/ FEDORA:FEDORA-2020-df772b417b URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/ MISC:https://xenbits.xenproject.org/xsa/advisory-322.html MLIST:[oss-security] 20201216 Xen Security Advisory 322 v5 (CVE-2020-29481) - Xenstore: new domains inheriting existing node permissions URL:http://www.openwall.com/lists/oss-security/2020/12/16/3
Assigning CNA
MITRE Corporation
Date Record Created
20201203	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20201203)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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