Vulnerability Description
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Affected versions were found to improperly decode certain characters. JSON strings that contain escaped surrogate characters not part of a proper surrogate pair were decoded incorrectly. Besides corrupting strings, this allowed for potential key confusion and value overwriting in dictionaries. All users parsing JSON from untrusted sources are vulnerable. From version 5.4.0, UltraJSON decodes lone surrogates in the same way as the standard library's `json` module does, preserving them in the parsed output. Users are advised to upgrade. There are no known workarounds for this issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ultrajson Project | Ultrajson | < 5.4.0 |
| Fedoraproject | Fedora | 35 |
Related Weaknesses (CWE)
References
- https://github.com/ultrajson/ultrajson/commit/67ec07183342589d602e0fcf7bb1ff3e19PatchThird Party Advisory
- https://github.com/ultrajson/ultrajson/security/advisories/GHSA-wpqr-jcpx-745rExploitThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://github.com/ultrajson/ultrajson/commit/67ec07183342589d602e0fcf7bb1ff3e19PatchThird Party Advisory
- https://github.com/ultrajson/ultrajson/security/advisories/GHSA-wpqr-jcpx-745rExploitThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2022-31116?
CVE-2022-31116 is a vulnerability with a CVSS score of 7.5 (HIGH). UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Affected versions were found to improperly decode certain characters. JSON strings that contain escaped su...
How severe is CVE-2022-31116?
CVE-2022-31116 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-31116?
Check the references section above for vendor advisories and patch information. Affected products include: Ultrajson Project Ultrajson, Fedoraproject Fedora.