xiboon kurwov up to 3.2.4 MarkovData#getNext deserialization

Summaryinfo

A vulnerability, which was classified as problematic, was found in xiboon kurwov up to 3.2.4. This affects the function MarkovData#getNext. Executing a manipulation can lead to deserialization. This vulnerability is tracked as CVE-2024-34075. The attack is restricted to local execution. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in xiboon kurwov up to 3.2.4. This vulnerability affects the function MarkovData#getNext. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect availability. CVE summarizes:

kurwov is a fast, dependency-free library for creating Markov Chains. An unsafe sanitization of dataset contents on the `MarkovData#getNext` method used in `Markov#generate` and `Markov#choose` allows a maliciously crafted string on the dataset to throw and stop the function from running properly. If a string contains a forbidden substring (i.e. `__proto__`) followed by a space character, the code will access a special property in `MarkovData#finalData` by removing the last character of the string, bypassing the dataset sanitization (as it is supposed to be already sanitized before this function is called). Any dataset can be contaminated with the substring making it unable to properly generate anything in some cases. This issue has been addressed in version 3.2.5 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

The advisory is available at github.com. This vulnerability was named CVE-2024-34075 since 04/30/2024. The exploitation appears to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

Upgrading to version 3.2.5 eliminates this vulnerability.

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Productinfo

Vendor

• xiboon

Name

• kurwov

Version

• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4

Website

• Product: https://github.com/xiboon/kurwov/

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CPE 2.2info

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