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
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-06-08 03:12:40 UTC

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

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