CVE catalog

CVE-2018-20679

busybox: CVE-2018-20679

Severity: High · CVSS 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jan 9, 2019, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 7.69% · Oct 25, 2026

An issue was discovered in BusyBox before 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP server, client, and relay) allows a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to verification in udhcp_get_option() in networking/udhcp/common.c that 4-byte options are indeed 4 bytes.

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	busybox	sid	`1:1.38.0-3`	fixed
Debian	busybox	forky	`1:1.38.0-3`	fixed
Debian	busybox	trixie	`1:1.37.0-6`	fixed
Debian	busybox	bookworm	`1:1.35.0-4+deb12u1`	fixed
Alpine	busybox	3.10	`1.29.3-r10`	fixed
Alpine	busybox	3.11	`1.29.3-r10`	fixed
Alpine	busybox	3.12	`1.29.3-r10`	fixed
Alpine	busybox	3.13	`1.29.3-r10`	fixed
Alpine	busybox	3.14	`1.29.3-r10`	fixed
Alpine	busybox	3.15	`1.29.3-r10`	fixed
Alpine	busybox	3.16	`1.29.3-r10`	fixed
Alpine	busybox	3.17	`1.29.3-r10`	fixed
Alpine	busybox	3.18	`1.29.3-r10`	fixed
Alpine	busybox	3.19	`1.29.3-r10`	fixed
Alpine	busybox	3.20	`1.29.3-r10`	fixed
Alpine	busybox	3.21	`1.29.3-r10`	fixed
Alpine	busybox	3.22	`1.29.3-r10`	fixed
Alpine	busybox	3.23	`1.29.3-r10`	fixed
Alpine	busybox	3.24	`1.29.3-r10`	fixed
Alpine	busybox	3.9	`1.29.3-r10`	fixed
Ubuntu	busybox	14.04	`1:1.20.0-8.1ubuntu1`	vulnerable
Ubuntu	busybox	14.04	`1:1.20.0-9ubuntu1`	vulnerable
Ubuntu	busybox	14.04	`1:1.20.0-9ubuntu2`	vulnerable
Ubuntu	busybox	14.04	`1:1.21.0-1ubuntu1`	vulnerable
Ubuntu	busybox	14.04	`1:1.21.0-1ubuntu1.4`	fixed
Ubuntu	busybox	16.04	`1:1.22.0-15ubuntu1`	vulnerable
Ubuntu	busybox	16.04	`1:1.22.0-15ubuntu1.4`	fixed
Ubuntu	busybox	18.04	`1:1.22.0-19ubuntu2`	vulnerable
Ubuntu	busybox	18.04	`1:1.27.2-1ubuntu3`	vulnerable
Ubuntu	busybox	18.04	`1:1.27.2-1ubuntu4`	vulnerable
Ubuntu	busybox	18.04	`1:1.27.2-2ubuntu2`	vulnerable
Ubuntu	busybox	18.04	`1:1.27.2-2ubuntu3`	vulnerable
Ubuntu	busybox	18.04	`1:1.27.2-2ubuntu3.1`	vulnerable
Ubuntu	busybox	18.04	`1:1.27.2-2ubuntu3.2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	busybox	source	sid	`1:1.30.1-1`	low	Not reported	[918846]
Debian	busybox	source	forky	`1:1.30.1-1`	low	Not reported	[918846]
Debian	busybox	source	trixie	`1:1.30.1-1`	low	Not reported	[918846]
Debian	busybox	source	bookworm	`1:1.30.1-1`	low	Not reported	[918846]
Alpine	busybox	apk	3.10	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.11	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.12	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.13	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.14	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.15	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.16	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.17	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.18	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.19	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.20	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.21	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.22	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.23	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.24	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Alpine	busybox	apk	3.9	`1.29.3-r10`	Not reported	ALPINE-CVE-2018-20679	Not reported
Ubuntu	busybox	deb	14.04	`1:1.21.0-1ubuntu1.4`	Not reported	UBUNTU-CVE-2018-20679	Not reported
Ubuntu	busybox	deb	16.04	`1:1.22.0-15ubuntu1.4`	Not reported	UBUNTU-CVE-2018-20679	Not reported
Ubuntu	busybox	deb	18.04	`1:1.27.2-2ubuntu3.2`	Not reported	UBUNTU-CVE-2018-20679	Not reported

[Debian bug #918846]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[busybox]Fixed
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[busybox-static]Fixed
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[busybox-syslogd]Fixed
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1 · all · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1 · all · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[udhcpc]Fixed
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[udhcpd]Fixed
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

[Debian 13 (Trixie)]

[busybox]Fixed
Source package: [busybox]
Details (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
[busybox-static]Fixed
Source package: [busybox]
Details (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
[busybox-syslogd]Fixed
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
[udhcpc]Fixed
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
[udhcpd]Fixed
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Fixed · Fixed: 1:1.30.1-1
  dsa · busybox · debian · 13

Observed: Oct 23, 2026, 5:36:05 PM UTC

References

[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]