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CVE-2019-5747

Published: 9 January 2019

An 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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
busybox
Launchpad, Ubuntu, Debian
bionic
Released (1:1.27.2-2ubuntu3.2)
cosmic
Released (1:1.27.2-2ubuntu4.1)
disco
Released (1:1.27.2-2ubuntu5)
eoan
Released (1:1.27.2-2ubuntu5)
focal
Released (1:1.27.2-2ubuntu5)
groovy
Released (1:1.27.2-2ubuntu5)
hirsute
Released (1:1.27.2-2ubuntu5)
trusty
Released (1:1.21.0-1ubuntu1.4)
upstream
Released (1:1.30.1-2)
xenial
Released (1:1.22.0-15ubuntu1.4)
Patches:
upstream: https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N