Denial of Service Vulnerability in Xenstore Affects Xen Project
CVE-2022-42311

6.5MEDIUM

Key Information:

Vendor

Xen Project
Status
Xen Project
Vendor
CVE Published:
1 November 2022

What is CVE-2022-42311?

Xenstore can be exploited by malicious guests, leading to significant memory depletion and consequently a Denial of Service. Attackers can trigger memory saturation through various methods: repeatedly issuing requests without reading responses, creating excessive watch events, crafting numerous nodes with maximum size limitations, and accessing many nodes simultaneously within transactions. This capability poses a considerable risk, as it can lead to xenstored being overwhelmed and inaccessible, disrupting services reliant on this component.

Affected Version(s)

xen consult Xen advisory XSA-326

References

https://xenbits.xenproject.org/xsa/advisory-326.txt
http://xenbits.xen.org/xsa/advisory-326.html
https://www.debian.org/security/2022/dsa-5272
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Julien Grall of Amazon.'}]}}}
.