Buffer overflow in Dnsmasq Dnsmasq-Utils
CVE-2020-37127
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (8.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Dnsmasq Dnsmasq-Utils — versions 2.79
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/48301 (exploit)
- launchpad.net/ubuntu/+source/dnsmasq/2.79-1 (product)
- www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-service (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37127?
- CVE-2020-37127 is a medium-severity vulnerability in Dnsmasq Dnsmasq-Utils, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-02-05.
- How severe is CVE-2020-37127?
- Medium severity. CVSS v3 base score is 5.5 out of 10.