Denial of Service Vulnerability in Xenstore by Xen Project
CVE-2022-42314

6.5MEDIUM

Key Information:

Vendor

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

What is CVE-2022-42314?

The vulnerability in Xenstore allows malicious guests to exploit memory management by issuing requests without processing responses, leading to excessive memory allocation. This can result in a Denial of Service (DoS) attack by overflowing the xenstored service. Attackers can trigger large memory consumption through various means, such as creating numerous watch events, generating multiple nodes with maximum size, or making extensive access within transactions. The consequences are detrimental for overall system availability, as they can effectively cripple xenstored by exhausting its memory resources.

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Deploy the Patch

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.'}]}}}
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