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
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-1245
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1386110 1391914
Blocks: 1386080 1386111
TreeView+ depends on / blocked
 
Reported: 2016-10-18 07:58 UTC by Andrej Nemec
Modified: 2019-09-29 13:58 UTC (History)
5 users (show)

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.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:00:20 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:0794 0 normal SHIPPED_LIVE Moderate: quagga security and bug fix update 2017-03-21 12:50:48 UTC

Description Andrej Nemec 2016-10-18 07:58:56 UTC 
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 07:59:19 UTC 
Created quagga tracking bugs for this issue:

Affects: fedora-all [bug 1386110]
Comment 7 Dhiru Kholia 2016-10-21 08:18:19 UTC 
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 11:56:55 UTC 
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
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