CVE-2021-3999
moderate-risk
Published 2022-08-24
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.
Do I need to act?
-
0.85% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10
High
LOCAL
/ LOW complexity
Affected Products (11)
References (16)
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3999
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2024637
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-3999
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221104-0001/
Issue Tracking
https://sourceware.org/bugzilla/show_bug.cgi?id=28769
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3999
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2024637
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-3999
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221104-0001/
Issue Tracking
https://sourceware.org/bugzilla/show_bug.cgi?id=28769
43
/ 100
moderate-risk
Severity
24/34 · High
Exploitability
3/34 · Minimal
Exposure
16/34 · Moderate