CVE-2018-20679
CVSS v3
7.5
HIGH
EPSS Score
7.7 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
- CVE-2018-20679 Red Hat Product Security
busybox: Out of bounds read in udhcp components resulting in information disclosure
Advantech Spectre RT Industrial Routers
Spectre RT ERT351: firmware Versions 5.1.3 and prior
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.
Technical details
- Published
- 2019-01-09
Frequently asked questions
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