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
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2017-7479
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: 1451000 1451001
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-05-15 14:27 UTC by Adam Mariš
Modified: 2021-02-17 02:09 UTC (History)
4 users (show)

Fixed In Version: openvpn 2.3.15, openvpn 2.4.2
Clone Of:
Environment:
Last Closed: 2019-06-08 03:12:40 UTC
Embargoed:

Attachments (Terms of Use)

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 2 David Sommerseth 2017-05-15 14:28:38 UTC 
Updated in Fedora/Fedora EPEL:

* F-24:  (in progress, will be updated to 2.3.15)
* F-25:  https://bodhi.fedoraproject.org/updates/FEDORA-2017-0d0f18140a
* F-26:  https://bodhi.fedoraproject.org/updates/FEDORA-2017-89d98779ec
* EL6:   https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-6ee18d1c7b
* EPEL7: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-c9f915d837
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]
Comment 4 Product Security DevOps Team 2019-06-08 03:12:40 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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