Signed Comparison Vulnerability in GNU glibc 2.30.9000 on ARMv7 Targets

CVE-2020-6096

What is CVE-2020-6096?

A signed comparison vulnerability exists in the memcpy() implementation of GNU glibc 2.30.9000 specifically for ARMv7 architecture. Exploiting this flaw occurs when the 'num' parameter is passed a negative value, leading to an underflow condition. This can result in undefined behaviors like memory corruption, where the program may write data to out-of-bounds memory locations. The vulnerability allows for continued execution of manipulated code, risking remote code execution or other severe security issues, all while potentially bypassing normal fault protections like segmentation faults.

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