Bug 1450997 (CVE-2017-7479) - CVE-2017-7479 openvpn: DoS due to exhaustion of packet-ID counter
Summary: CVE-2017-7479 openvpn: DoS due to exhaustion of packet-ID counter
Status: NEW
Alias: CVE-2017-7479
Product: Security Response
Classification: Other
Component: vulnerability   
(Show other bugs)
Version: unspecified
Hardware: All Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20170511,repor...
Keywords: Security
Depends On: 1451000 1451001
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-05-15 14:27 UTC by Adam Mariš
Modified: 2017-05-15 14:32 UTC (History)
4 users (show)

Fixed In Version: openvpn 2.3.15, openvpn 2.4.2
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2017-05-15 14:27:22 UTC
An authenticated client can cause the server's the packet-id counter to roll over, which would lead the server process to hit an ASSERT() and stop running.

Upstream fixes:

openvpn 2.3: https://github.com/OpenVPN/openvpn/commit/b727643cdf
openvpn 2.4: https://github.com/OpenVPN/openvpn/commit/591a4e574c
master: https://github.com/OpenVPN/openvpn/commit/e498cb0ea8

External References:

https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits

Comment 1 Adam Mariš 2017-05-15 14:27:38 UTC
Acknowledgments:

Name: the OpenVPN project
Upstream: QuarksLab

Comment 3 Adam Mariš 2017-05-15 14:32:16 UTC
Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 1451001]
Affects: fedora-all [bug 1451000]


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