CVE-2020-37127

MEDIUM

Dnsmasq-utils <2.79-1 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-37127. PoCs published by JosueEncinar.

AI-analyzed exploit summary This PoC demonstrates a buffer overflow vulnerability in dnsmasq-utils 2.79-1 by exploiting the 'dhcp_release' command with an increasingly large argument. It triggers a crash when the input exceeds a certain length, confirming the vulnerability.

Description

Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.

Exploits (1)

exploitdb WORKING POC
by JosueEncinar · pythondoslinux
https://www.exploit-db.com/exploits/48301

This PoC demonstrates a buffer overflow vulnerability in dnsmasq-utils 2.79-1 by exploiting the 'dhcp_release' command with an increasingly large argument. It triggers a crash when the input exceeds a certain length, confirming the vulnerability.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: dnsmasq-utils 2.79-1
No auth needed
Prerequisites: Access to execute 'dhcp_release' command on the target system
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/48301

Scores

CVSS v3 5.5
EPSS 0.0018
EPSS Percentile 7.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-121
Status published
Products (1)
dnsmasq/dnsmasq-utils 2.79
Published Feb 05, 2026
Tracked Since Feb 18, 2026