PT-2022-7328 · Xenstore+1 · Xenstore+1

Julien Grall · Published 2022-11-01 · Updated 2025-05-05 · CVE-2022-42316

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Xenstore (affected versions not specified)

Description The issue is related to the uncontrolled allocation of resources in Xenstore, which can lead to a Denial of Service (DoS) of xenstored. Malicious guests can cause xenstored to allocate large amounts of memory through various methods, including:

• issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory
• causing a large number of watch events to be generated via setting up multiple xenstore watches and then deleting many xenstore nodes below the watched path
• creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible
• accessing many nodes inside a transaction.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

BDU:2024-03584

CVE-2022-42316

DSA-5272-1

OPENSUSE-SU-2022_3947-1

OPENSUSE-SU-2022_4007-1

SUSE-SU-2022:3925-1

SUSE-SU-2022:3928-1

SUSE-SU-2022:3947-1

SUSE-SU-2022:3960-1

SUSE-SU-2022:3971-1

SUSE-SU-2022:4007-1

SUSE-SU-2022:4051-1

SUSE-SU-2022:4241-1

SUSE-SU-2022:4332-1

Affected Products

Suse

Xenstore

References · 85

• https://ubuntu.com/security/CVE-2022-42316 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-42316 · Vendor Advisory
• http://xenbits.xen.org/xsa/advisory-326.html · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:4007-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:3960-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:3928-1 · Vendor Advisory
• https://debian.org/security/2022/dsa-5272 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-42316 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2022:4332-1 · Vendor Advisory
• https://xenbits.xenproject.org/xsa/advisory-326.txt · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2022-42316 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:3925-1 · Vendor Advisory