CVE-2024-34075 Information

Description

kurwov is a fast dependency-free library for creating Markov Chains. An unsafe sanitization of dataset contents on the MarkovDatagetNext method used in Markovgenerate and Markovchoose 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 MarkovDatafinalData 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.

Reference

https://github.com/xiboon/kurwov/security/advisories/GHSA-hfrv-h3q8-9jpr https://github.com/xiboon/kurwov/commit/85d63e652594f121d6656177d7a3c0d823c976c9 https://github.com/xiboon/kurwov/blob/0d58dfa42135ab40e830e92622857282f980ca89/src/MarkovData.ts#L38-L44