CVE-2021-45953

critical

Description

** DISPUTED ** Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from hash_questions and fuzz_util.c). 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

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35858

https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-929.yaml

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html

Details

Source: MITRE

Published: 2022-01-01

Updated: 2022-03-18

Type: CWE-787

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL