UltraJSON 5.4.0 JSON String control flow

Summaryinfo

A vulnerability has been found in UltraJSON 5.4.0 and classified as critical. Impacted is an unknown function of the component JSON String Handler. Performing a manipulation results in control flow. This vulnerability is identified as CVE-2022-31116. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in UltraJSON 5.4.0. This affects an unknown part of the component JSON String Handler. The manipulation with an unknown input leads to a control flow vulnerability. CWE is classifying the issue as CWE-670. The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was released 07/05/2022 as GHSA-wpqr-jcpx-745r. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2022-31116 since 05/18/2022. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 224690 (Linux Distros Unpatched Vulnerability : CVE-2022-31116), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability. Applying the patch 67ec07183342589d602e0fcf7bb1ff3e19272687 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (224690). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• UltraJSON

Version

• 5.4.0

License

• open-source

Website

• Product: https://github.com/ultrajson/ultrajson/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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