CVE Vulnerability

CVE-2021-45955

** DISPUTED ** Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from FuzzResizePacket and fuzz_rfc1035.c) because of the lack of a proper bounds check upon pseudo header re-insertion. 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." However, a contributor states that a security patch (mentioned in 016162.html) is needed.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-932.yaml Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35898 Exploit Issue Tracking
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html Mailing List Third Party Advisory
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:thekelleys:dnsmasq:2.86:*:*:*:*:*:*:*
Information

Published : 2022-01-01 12:15

Updated : 2022-03-18 01:33

NVD link : CVE-2021-45955

Mitre link : CVE-2021-45955

Products Affected
No products.
CWE
CWE-787