CVE-2018-20679

busybox: Out of bounds read in udhcp components resulting in information disclosure

Published Jan 9, 2019 CVSS 3.1 · 7.5 High EPSS 7.7% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-3935-1 BusyBox vulnerabilities
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jun 9, 2025, 3:26 PM
Reserved
Jan 9, 2019, 12:00 AM
Status
Modified
Published
Jan 9, 2019, 4:29 PM
Modified
Jun 17, 2026, 1:53 AM
Severity
Low
Public date
Nov 12, 2018, 12:00 AM