CVE-2021-45952
CRITICALdnsmasq 2.86 - Heap-based Buffer Overflow in dhcp_reply
Title source: llmDescription
Dnsmasq 2.86 has a heap-based buffer overflow in dhcp_reply (called from dhcp_packet and FuzzDhcp). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge.
References (4)
Core 4
Core References
Third Party Advisory x_refsource_misc
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-927.yaml
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35870
Mailing List, Third Party Advisory x_refsource_misc
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html
Mailing List, Third Party Advisory x_refsource_misc
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html
Scores
CVSS v3
9.8
EPSS
0.0259
EPSS Percentile
83.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-787
Status
published
Products (1)
thekelleys/dnsmasq
2.86
Published
Jan 01, 2022
Tracked Since
Feb 18, 2026