Vulnerability in Gnu Glibc
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 s…
EPSS: 0.007 (49.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Exploit, Mailing List, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3999?
- CVE-2021-3999 is a high-severity vulnerability in Gnu Glibc, classified under Off-by-one Error. CVSS score: 7.8/10. Published 2022-08-24.
- How severe is CVE-2021-3999?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-3999 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.