CVE-2024-29943

Un atacante pudo realizar una lectura o escritura fuera de los límites en un objeto JavaScript engañando la eliminación de verificación de los límites basada en rangos. Esta vulnerabilidad afecta a Firefox < 124.0.1.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the SpiderMonkey JIT compiler. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process at low integrity.

USN-6710-1 fixed vulnerabilities in Firefox. The update introduced several minor regressions. This update fixes the problem. Manfred Paul discovered that Firefox did not properly perform bounds checking during range analysis, leading to an out-of-bounds write vulnerability. A attacker could use this to cause a denial of service, or execute arbitrary code. Manfred Paul discovered that Firefox incorrectly handled MessageManager listeners under certain circumstances. An attacker who was able to inject an event handler into a privileged object may have been able to execute arbitrary code.