CVE-2022-42324
First published: Tue Nov 01 2022(Updated: )
Oxenstored 32->31 bit integer truncation issues Integers in Ocaml are 63 or 31 bits of signed precision. The Ocaml Xenbus library takes a C uint32_t out of the ring and casts it directly to an Ocaml integer. In 64-bit Ocaml builds this is fine, but in 32-bit builds, it truncates off the most significant bit, and then creates unsigned/signed confusion in the remainder. This in turn can feed a negative value into logic not expecting a negative value, resulting in unexpected exceptions being thrown. The unexpected exception is not handled suitably, creating a busy-loop trying (and failing) to take the bad packet out of the xenstore ring.
Credit: security@xen.org 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-420.html
- https://security-tracker.debian.org/tracker/CVE-2022-42324
- http://www.openwall.com/lists/oss-security/2022/11/01/10
- http://xenbits.xen.org/xsa/advisory-420.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-420.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/
- https://security.gentoo.org/glsa/202402-07
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2022-42324.
What is the severity of CVE-2022-42324?
The severity of CVE-2022-42324 is medium.
What software is affected by CVE-2022-42324?
The software affected by CVE-2022-42324 includes Xen Xen, Debian Debian Linux (version 11.0), and Fedoraproject Fedora (versions 35, 36, and 37).
How can I fix CVE-2022-42324?
To fix CVE-2022-42324, it is recommended to update to the following versions: Xen (4.14.6-1 or later), Debian Debian Linux (version 11.0 or later), and Fedoraproject Fedora (version 35, 36, or 37).
Where can I find more information about CVE-2022-42324?
More information about CVE-2022-42324 can be found in the following references: [advisory-420](https://xenbits.xen.org/xsa/advisory-420.html), [security-tracker.debian.org](https://security-tracker.debian.org/tracker/CVE-2022-42324), [openwall.com](http://www.openwall.com/lists/oss-security/2022/11/01/10).
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