CVE-2023-52079: 
JavaScript vulnerability analysis and mitigation

msgpackr, a fast MessagePack NodeJS/JavaScript implementation, was found to contain a vulnerability (CVE-2023-52079) prior to version 1.10.1. The vulnerability was discovered when decoding user-supplied MessagePack messages, where attackers could trigger stuck threads by crafting messages that keep the decoder stuck in a loop (GitHub Advisory).

The vulnerability is related to uncontrolled recursion (CWE-674) and improper check for unusual or exceptional conditions (CWE-754) in the message decoding process. The CVSS v3.1 base score is 6.5 (MEDIUM) according to NVD with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, while GitHub rates it at 6.8 (MEDIUM) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H (NVD).

The primary impact of this vulnerability is on system availability. When successfully exploited, the vulnerability can cause threads to become stuck in a loop, potentially leading to a denial of service condition (GitHub Advisory).

The vulnerability has been patched in version 1.10.1 of msgpackr. As a workaround, users can replace the 0x70 extension with a custom extension that throws an error or performs an action other than recursive referencing (GitHub Advisory, GitHub Patch).