What’s Vulnerable › Vulnerabilities

CVE-2020-37127: dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-05 · updated 2026-06-17
• Weakness: CWE-121

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.

Affected products

• dnsmasq-utils: 2.79

References

• https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1
• https://www.exploit-db.com/exploits/48301
• https://www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-service

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