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.
[
{
"vendor": "n/a",
"product": "glibc",
"versions": [
{
"version": "Fixed in glibc v2.31 and above.",
"status": "affected"
}
]
}
]
access.redhat.com/security/cve/CVE-2021-3999
bugzilla.redhat.com/show_bug.cgi?id=2024637
lists.debian.org/debian-lts-announce/2022/10/msg00021.html
security-tracker.debian.org/tracker/CVE-2021-3999
security.netapp.com/advisory/ntap-20221104-0001/
sourceware.org/bugzilla/show_bug.cgi?id=28769
sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
www.openwall.com/lists/oss-security/2022/01/24/4