Bug 1667067 (CVE-2019-5747)

Summary:	CVE-2019-5747 busybox: Out of bounds read in udhcp components resulting in information disclosure
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	admiller, athmanem, dvlasenk
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-01-22 14:10:55 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1667069
Bug Blocks:	1666670

Description Dhananjay Arunesh 2019-01-17 11:17:40 UTC

An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP server, client, 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.
 
Upstream issue:
 
https://bugs.busybox.net/show_bug.cgi?id=11506
 
Upstream patch:
 
https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06

Comment 1 Dhananjay Arunesh 2019-01-17 11:17:59 UTC

Created busybox tracking bugs for this issue:

Affects: fedora-all [bug 1667069]

Comment 2 Stefan Cornelius 2019-01-22 14:09:29 UTC

Statement:

This issue did not affect the versions of busybox as shipped with Red Hat Enterprise Linux 5 and 6.