CVSS 3.1 Score 6.5 of 10 (medium)


Published Sep 11, 2023
Updated: Sep 14, 2023
CWE ID 770


CVE-2023-4578 is a vulnerability that affects Firefox versions below 117, Firefox ESR versions below 115.2, and Thunderbird versions below 115.2. It is a syntax error vulnerability that occurs when calling `JS::CheckRegExpSyntax`, leading to memory allocation attempts when none is available, causing mishandling of the Out of Memory exception as a Syntax Error. The vulnerability has a base severity rating of MEDIUM with a base score of 6.5 according to NVD. The exploitability score is 2.8, and user interaction is required for exploitation. The attack vector is through the network, and it has a low attack complexity. While it does not impact integrity or confidentiality, it has a high availability impact.


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