Buffer overflow in Thekelleys Dnsmasq
CVE-2021-45951
Dnsmasq 2.86 has a heap-based buffer overflow in check_bad_address (called from check_for_bogus_wildcard and FuzzCheckForBogusWildcard). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulne…
Vulnerability class: Buffer Overflow
EPSS: 0.026 (83.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Thekelleys Dnsmasq — versions 2.86
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Mailing List, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-45951?
- CVE-2021-45951 is a critical-severity vulnerability in Thekelleys Dnsmasq, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-01-01.
- How severe is CVE-2021-45951?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-45951 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.