CVE-2022-41916: Read one byte past a buffer when normalizing Unicode
First published: Tue Nov 15 2022(Updated: )
Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Heimdal Project Heimdal | <7.7.1 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| debian/heimdal | <=7.5.0+dfsg-3 | 7.5.0+dfsg-3+deb10u2 7.7.0+dfsg-2+deb11u3 7.8.git20221117.28daf24+dfsg-2 7.8.git20221117.28daf24+dfsg-3 |
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Reference Links
- https://github.com/heimdal/heimdal/security/advisories/GHSA-mgqr-gvh6-23cx
- https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
- https://security.gentoo.org/glsa/202310-06
- https://security.netapp.com/advisory/ntap-20230216-0008/
- https://www.debian.org/security/2022/dsa-5287
- https://github.com/heimdal/heimdal/commit/eb87af0c2d189c25294c7daf483a47b03af80c2c
- https://security-tracker.debian.org/tracker/CVE-2022-41916
Frequently Asked Questions
What is CVE-2022-41916?
CVE-2022-41916 is a vulnerability in Heimdal's PKI certificate validation library that allows for a denial of service attack.
What versions of Heimdal are affected by CVE-2022-41916?
Versions prior to 7.7.1 of Heimdal are vulnerable to CVE-2022-41916.
How can I fix CVE-2022-41916?
To fix CVE-2022-41916, you should update to Heimdal version 7.7.1 or later.
What is the severity level of CVE-2022-41916?
CVE-2022-41916 has a severity level of high.
Where can I find more information about CVE-2022-41916?
More information about CVE-2022-41916 can be found at the following references: [link1](https://github.com/heimdal/heimdal/security/advisories/GHSA-mgqr-gvh6-23cx), [link2](https://github.com/heimdal/heimdal/commit/eb87af0c2d189c25294c7daf483a47b03af80c2c), [link3](https://security-tracker.debian.org/tracker/CVE-2022-41916).
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