CVE-2021-3999 – glibc: Off-by-one buffer overflow/underflow in getcwd()

https://notcve.org/view.php?id=CVE-2021-3999

A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system. Se ha encontrado un fallo en glibc. Un desbordamiento y subdesbordamiento de búfer en la función getcwd() puede conllevar a una corrupción de memoria cuando el tamaño del búfer es exactamente 1. • https://access.redhat.com/security/cve/CVE-2021-3999 https://bugzilla.redhat.com/show_bug.cgi?id=2024637 https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html https://security-tracker.debian.org/tracker/CVE-2021-3999 https://security.netapp.com/advisory/ntap-20221104-0001 https://sourceware.org/bugzilla/show_bug.cgi?id=28769 https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e https://www.openwall.com/lists/oss-security/2022/01/24/4 • CWE-193: Off-by-one Error •