CVE-2021-45955 - CVE House
Back to Database
Status published Critical CVE-2021-45955

Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called...

Vulnerability Description

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

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-45955

Credits & Attribution

No credits recorded in the NVD database.

References

More from thekelleys

View All →
CVE-2021-45957
Dnsmasq 2.86 has a heap-based buffer overflow in answer_request (called...
Critical 9.8
CVE-2021-45956
Dnsmasq 2.86 has a heap-based buffer overflow in print_mac (called...
Unknown 0
CVE-2021-45954
Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called...
Critical 9.8
CVE-2021-45953
Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called...
Critical 9.8
CVE-2021-45952
Dnsmasq 2.86 has a heap-based buffer overflow in dhcp_reply (called...
Critical 9.8

Affected Vendor

Affected Software

dnsmasq
Vulnerable Versions:
2.86

Timeline

Official Publish: December 31st, 2021
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.