CVE-2022-31117: Double Free

July 5, 2022 (updated November 7, 2023)

UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. In versions prior to 5.4.0 an error occurring while reallocating a buffer for string decoding can cause the buffer to get freed twice. Due to how UltraJSON uses the internal decoder, this double free is impossible to trigger from Python. This issue has been resolved in version 5.4.0 and all users should upgrade to UltraJSON 5.4.0. There are no known workarounds for this issue.

References

github.com/advisories/GHSA-fm67-cv37-96ff
github.com/ultrajson/ultrajson/commit/9c20de0f77b391093967e25d01fb48671104b15b
github.com/ultrajson/ultrajson/security/advisories/GHSA-fm67-cv37-96ff
nvd.nist.gov/vuln/detail/CVE-2022-31117

Code Behaviors & Features

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