Bug 1450993 (CVE-2017-7478) - CVE-2017-7478 openvpn: Unauthenticated DoS via large control packets
Summary: CVE-2017-7478 openvpn: Unauthenticated DoS via large control packets
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2017-7478
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1451000 1451001
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-05-15 14:20 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 03:12:38 UTC
Embargoed:

Attachments (Terms of Use)

Description Adam Mariš 2017-05-15 14:20:08 UTC 
Asserting on the length of received control packets can lead to unauthenticated denial of service when received control packet is too large.

This issue affects OpenVPN 2.3.12 and newer.

Upstream fixes:

openvpn 2.3: https://github.com/OpenVPN/openvpn/commit/feb35ee5ca
openvpn 2.4: https://github.com/OpenVPN/openvpn/commit/66b99a0753
master: https://github.com/OpenVPN/openvpn/commit/5774cf4c25e

External References:

https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits
Comment 1 Adam Mariš 2017-05-15 14:20:23 UTC 
Acknowledgments:

Name: the OpenVPN project
Upstream: QuarksLab
Comment 2 David Sommerseth 2017-05-15 14:27:49 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 14:32:03 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 03:12:38 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.