Bug 1386109 – CVE-2016-1245 quagga: Buffer Overflow in IPv6 RA handling

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 1386109 - (CVE-2016-1245) CVE-2016-1245 quagga: Buffer Overflow in IPv6 RA handling

Summary:	CVE-2016-1245 quagga: Buffer Overflow in IPv6 RA handling

Status:	NEW

Aliases:	CVE-2016-1245

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20161018,repor...
Keywords:	Reopened, Security

Depends On:	1386110 1391914
Blocks:	1386080 1386111
	Show dependency tree / graph

Reported:	2016-10-18 03:58 EDT by Andrej Nemec
Modified:	2018-03-29 18:01 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:	Quagga 1.0.20161017
Doc Type:	If docs needed, set a value
Doc Text:	A stack-based buffer overflow flaw was found in the way Quagga handled IPv6 router advertisement messages. A remote attacker could use this flaw to crash the zebra daemon resulting in denial of service.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-10-19 06:59:28 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2017:0794	normal	SHIPPED_LIVE	Moderate: quagga security and bug fix update	2017-03-21 08:50:48 EDT

Groups: None (edit)

Description Andrej Nemec 2016-10-18 03:58:56 EDT

A buffer overflow exists in the IPv6 (Router Advertisement) code in Zebra. The issue can be triggered on an IPv6 address where the Quagga daemon is reachable by a RA (Router Advertisement or IPv6 ICMP message. The issue leads to a crash of the zebra daemon. In specific circumstances this vulnerability may allow remote code execution.

Upstream patch:

https://github.com/Quagga/quagga/commit/cfb1fae25f8c092e0d17073eaf7bd428ce1cd546

References:

http://www.gossamer-threads.com/lists/quagga/users/31952

Workarounds:

Disable IPv6 neighbor discovery announcements on all interfaces ("ipv6 nd suppress-ra" configured under all interfaces).  Make sure to have it disabled on ALL interfaces.

Comment 1 Andrej Nemec 2016-10-18 03:59:19 EDT

Created quagga tracking bugs for this issue:

Affects: fedora-all [bug 1386110]

Comment 7 Dhiru Kholia 2016-10-21 04:18:19 EDT

On RHEL (and Fedora), the usage of -fstack-protector compilation flag limits the impact of this stack-based buffer overflow to a crash (denial-of-service) in the zebra daemon. Our CVSS scores reflect this fact.

Comment 11 errata-xmlrpc 2017-03-21 07:56:55 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:0794 https://rhn.redhat.com/errata/RHSA-2017-0794.html

Note You need to log in before you can comment on or make changes to this bug.