DescriptionAn issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
busybox (PTS)buster1:1.30.1-4fixed
bookworm, sid1:1.35.0-4fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
busyboxsourcejessie(not affected)
busyboxsourcestretch(not affected)
busyboxsourcebuster(not affected)


[buster] - busybox <not-affected> (Incomplete fix for CVE-2018-20679 did not reach buster)
[stretch] - busybox <not-affected> (Incomplete fix for CVE-2018-20679 not applied)
[jessie] - busybox <not-affected> (Incomplete fix for CVE-2018-20679 not applied)

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