Bug 1509291 (CVE-2017-16227) - CVE-2017-16227 quagga: Incorrect AS_PATH size calculation for long paths
Summary: CVE-2017-16227 quagga: Incorrect AS_PATH size calculation for long paths
Status: CLOSED WONTFIX
Alias: CVE-2017-16227
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: impact=moderate,public=20171002,repor...
Keywords: Security
Depends On: 1509292
Blocks: 1509296
TreeView+ depends on / blocked
 
Reported: 2017-11-03 13:39 UTC by Adam Mariš
Modified: 2019-06-08 22:27 UTC (History)
5 users (show)

(edit)
A denial of service flaw was found in the way the bgpd daemon in Quagga handled the processing of large BGP update messages. A remote, previously trusted attacker could potentially use this flaw to cause bgpd to terminate existing BGP sessions, thereby leading to denial of service.
Clone Of:
(edit)
Last Closed: 2017-11-14 08:20:24 UTC


Attachments (Terms of Use)

Description Adam Mariš 2017-11-03 13:39:06 UTC
The aspath_put function in bgpd/bgp_aspath.c in Quagga before 1.2.2 allows remote attackers to cause a denial of service (session drop) via BGP UPDATE messages, because AS_PATH size calculation for long paths counts certain bytes twice and consequently constructs an invalid message.

Affected versions: 0.99.10 - 0.99.24.1, 1.0.*, 1.1.0, 1.1.1, 1.2.0, 1.2.1

Upstream patch:

https://git.savannah.gnu.org/cgit/quagga.git/commit/?id=7a42b78be9a4108d98833069a88e6fddb9285008

Reference:

https://lists.quagga.net/pipermail/quagga-dev/2017-September/033284.html

Comment 1 Adam Mariš 2017-11-03 13:39:37 UTC
Created quagga tracking bugs for this issue:

Affects: fedora-all [bug 1509292]


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