CVE-2022-42318
First published: Tue Nov 01 2022(Updated: )
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
Credit: security@xen.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xen | <=4.11.4+107-gef32c7afa2-1 | 4.14.6-1 4.14.5+94-ge49571868d-1 4.17.1+2-gb773c48e36-1 4.17.2+55-g0b56bed864-1 |
| Xen Xen | ||
| Debian Debian Linux | =11.0 | |
| Fedoraproject Fedora | =35 | |
| Fedoraproject Fedora | =36 | |
| Fedoraproject Fedora | =37 |
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Reference Links
- https://xenbits.xen.org/xsa/advisory-326.html
- https://security-tracker.debian.org/tracker/CVE-2022-42318
- http://xenbits.xen.org/xsa/advisory-326.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
- https://www.debian.org/security/2022/dsa-5272
- https://xenbits.xenproject.org/xsa/advisory-326.txt
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2022-42318.
What is the severity of CVE-2022-42318?
The severity of CVE-2022-42318 is medium with a CVSS score of 6.5.
How does CVE-2022-42318 affect Xen Xen?
CVE-2022-42318 affects Xen Xen, allowing malicious guests to cause xenstored to allocate excessive memory, leading to a Denial of Service (DoS) attack.
How can I fix CVE-2022-42318 on Debian Debian Linux?
To fix CVE-2022-42318 on Debian Debian Linux, update the xen package to version 4.14.6-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, or 4.17.2+55-g0b56bed864-1.
Where can I find more information about CVE-2022-42318?
You can find more information about CVE-2022-42318 at the following references: [Xen Advisory](https://xenbits.xen.org/xsa/advisory-326.html), [Debian Security Tracker](https://security-tracker.debian.org/tracker/CVE-2022-42318), [Xen Advisory Archive](http://xenbits.xen.org/xsa/advisory-326.html).
- collector/security-tracker-debian
- collector/nvd-index
- agent/event
- agent/weakness
- agent/references
- agent/severity
- agent/author
- agent/type
- agent/description
- agent/remedy
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- agent/tags
- collector/mitre-cve
- source/MITRE
- package-manager/debian
- vendor/xen
- canonical/xen xen
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/11.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- version/fedoraproject fedora/36
- version/fedoraproject fedora/37