by Kastro
Paper/Archive/CVE-2021-45956

CVE-2021-45956

thekelleys dnsmasq — Dnsmasq 2.86 has a heap-based buffer overflow in print_mac (called from log_packet and dhcp_reply).

EPSS 3%CVSS 9.8
critical.is priorityof 100
47
CVSS 9.8 (NVD, ADP agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 86.0.860 × 2017.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Dnsmasq 2.86 has a heap-based buffer overflow in print_mac (called from log_packet and dhcp_reply). 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.

Affected

ProductAffectedFixed inSource
n/an/a–CNA
dnsmasq2.86–CISA-ADP

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-933.yamlrefbugs.chromium.org/p/oss-fuzz/issues/detail?id=35887reflists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.htmlreflists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html