CVE-2022-42317

 

Published at: - 01-11-2022 02:15

Last modified: - 24-11-2022 04:15

Total changes: - 5

Description

Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://xenbits.xenproject.org/xsa/advisory-326.txt
• http://xenbits.xen.org/xsa/advisory-326.html
• DSA-5272-Third Party Advisory
• FEDORA-2022-07438e12df-Mailing List, Third Party Advisory
• FEDORA-2022-99af00f60e-Mailing List, Third Party Advisory
• FEDORA-2022-9f51d13fa3-

 

Keywords

NVD

 

CVE-2022-42317

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures