Bug 1316554 (CVE-2016-2147)

Summary:	CVE-2016-2147 busybox: out of bounds write (heap) due to integer underflow in udhcpc
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	admiller, cbuissar, dvlasenk
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-03-11 09:25:16 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:	1316558
Bug Blocks:	1316559

Description Martin Prpič 2016-03-10 13:17:20 UTC

An out of bound write was discovered in udhcpc when parsing the Domain Search option. An attacker could send a maliciously crafted packet answering a DHCP request triggering a denial of service on the client.

Comment 1 Martin Prpič 2016-03-10 13:17:29 UTC

Acknowledgments:

Name: Nico Golde (Qualcomm Product Security Initiative)

Comment 2 Martin Prpič 2016-03-10 13:21:08 UTC

Created busybox tracking bugs for this issue:

Affects: fedora-all [bug 1316558]

Comment 3 Cedric Buissart 2016-03-11 09:04:13 UTC

Upstream fix :
 - udhcp: fix a SEGV on malformed RFC1035-encoded domain name
https://git.busybox.net/busybox/commit/?id=d474ffc

and a minor regression :
 - udhcpc: fix a warning in debug code
https://git.busybox.net/busybox/commit/?id=1b7c17