CVE-2020-37127
dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service
- State
- Published
- Severity
- 6.9 Medium
- Published
- Feb 5, 2026
- Updated
- Feb 5, 2026
- Reserved
- Feb 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
dnsmasq-utilsdnsmasq |
|
References
- ExploitDB-48301exploit
- Software Link for dnsmasq 2.79-1product
- VulnCheck Advisory: dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Servicethird-party-advisory
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