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.
History

Mon, 09 Jun 2025 16:15:00 +0000

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-01-09T16:00:00.000Z

Updated: 2025-06-09T15:26:04.926Z

Reserved: 2019-01-09T00:00:00.000Z

Link: CVE-2018-20679

cve-icon Vulnrichment

Updated: 2024-08-05T12:05:17.686Z

cve-icon NVD

Status : Modified

Published: 2019-01-09T16:29:00.273

Modified: 2025-06-09T16:15:29.090

Link: CVE-2018-20679

cve-icon Redhat

Severity : Low

Publid Date: 2018-11-12T00:00:00Z

Links: CVE-2018-20679 - Bugzilla