CVE catalog
CVE-2020-37127
dnsmasq: CVE-2020-37127
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.21% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | dnsmasq | sid | 2.93-3 | fixed |
| Debian | dnsmasq | forky | 2.93-3 | fixed |
| Debian | dnsmasq | trixie | 2.91-1+deb13u2 | fixed |
| Debian | dnsmasq | trixie-security | 2.91-1+deb13u1 | fixed |
| Debian | dnsmasq | bookworm | 2.90-4~deb12u2 | fixed |
| Debian | dnsmasq | bookworm-security | 2.90-4~deb12u2 | fixed |
| Ubuntu | dnsmasq | pro | 2.66-4ubuntu1 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.67-1 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1ubuntu0.1 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1ubuntu0.2 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1ubuntu0.2+esm1 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1ubuntu0.2+esm2 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1ubuntu0.2+esm3 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1ubuntu0.2+esm5 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.68-1ubuntu0.2+esm6 | fixed |
| Ubuntu | dnsmasq | pro | 2.78-1 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.78-3 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.79-1 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.79-1ubuntu0.2 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.79-1ubuntu0.3 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.79-1ubuntu0.4 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.79-1ubuntu0.5 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.79-1ubuntu0.6 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.79-1ubuntu0.7 | vulnerable |
| Ubuntu | dnsmasq | pro | 2.90-0ubuntu0.18.04.1+esm1 | fixed |
| Ubuntu | dnsmasq | 22.04 | 2.85-1ubuntu2 | vulnerable |
| Ubuntu | dnsmasq | 22.04 | 2.86-1.1 | vulnerable |
| Ubuntu | dnsmasq | 22.04 | 2.86-1.1ubuntu0.1 | vulnerable |
| Ubuntu | dnsmasq | 22.04 | 2.86-1.1ubuntu0.2 | vulnerable |
| Ubuntu | dnsmasq | 22.04 | 2.86-1.1ubuntu0.3 | vulnerable |
| Ubuntu | dnsmasq | 22.04 | 2.86-1.1ubuntu0.4 | vulnerable |
| Ubuntu | dnsmasq | 22.04 | 2.86-1.1ubuntu0.5 | vulnerable |
| Ubuntu | dnsmasq | 22.04 | 2.90-0ubuntu0.22.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | dnsmasq | source | sid | 2.80-1 | unimportant | Not reported | Not reported |
| Debian | dnsmasq | source | forky | 2.80-1 | unimportant | Not reported | Not reported |
| Debian | dnsmasq | source | trixie | 2.80-1 | unimportant | Not reported | Not reported |
| Debian | dnsmasq | source | bookworm | 2.80-1 | unimportant | Not reported | Not reported |
| Ubuntu | dnsmasq | deb | pro | 2.68-1ubuntu0.2+esm6 | Not reported | USN-8311-1 | Not reported |
| Ubuntu | dnsmasq | deb | pro | 2.90-0ubuntu0.18.04.1+esm1 | Not reported | UBUNTU-CVE-2020-37127 | Not reported |
| Ubuntu | dnsmasq | deb | 22.04 | 2.90-0ubuntu0.22.04.1 | Not reported | UBUNTU-CVE-2020-37127 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [dnsmasq]Unknown
Details (4)
2.90-4~deb12u2· all · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· all · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· all · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· all · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
- [dnsmasq-base]Unknown
Source package: [dnsmasq]
Details (4)
2.90-4~deb12u2· amd64 · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· arm64 · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· amd64 · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· arm64 · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
- [dnsmasq-base-lua]Unknown
Source package: [dnsmasq]
Details (4)
2.90-4~deb12u2· amd64 · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· arm64 · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· amd64 · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· arm64 · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
- [dnsmasq-utils]Unknown
Source package: [dnsmasq]
Details (4)
2.90-4~deb12u2· amd64 · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· arm64 · bookwormFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· amd64 · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
2.90-4~deb12u2· arm64 · bookworm-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · bookworm; dsa · dnsmasq · debian · 12
[Debian 13 (Trixie)]
- [dnsmasq]Unknown
Details (4)
2.91-1+deb13u1· all · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· all · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· all · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· all · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
- [dnsmasq-base]Unknown
Source package: [dnsmasq]
Details (4)
2.91-1+deb13u1· amd64 · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· arm64 · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
- [dnsmasq-base-lua]Unknown
Source package: [dnsmasq]
Details (4)
2.91-1+deb13u1· amd64 · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· arm64 · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
- [dnsmasq-utils]Unknown
Source package: [dnsmasq]
Details (4)
2.91-1+deb13u1· amd64 · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· arm64 · trixieFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
2.91-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
2.80-1dsa · dnsmasq · debian · 13
Observed:
References
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-37127]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-37127]
- [https://osv.dev/vulnerability/USN-8311-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-37127]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-37127.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]