Detections
Analytics
CVE-2020-6096
high
Description
An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.
References
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019
https://sourceware.org/bugzilla/show_bug.cgi?id=25620
https://security.gentoo.org/glsa/202101-20
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html