Bug 1463642 (CVE-2017-7508, CVE-2017-7520, CVE-2017-7521, CVE-2017-7522) - CVE-2017-7508 CVE-2017-7520 CVE-2017-7521 CVE-2017-7522 openvpn: Multiple security issues fixed in OpenVPN 2.4.3 and 2.3.17
Summary: CVE-2017-7508 CVE-2017-7520 CVE-2017-7521 CVE-2017-7522 openvpn: Multiple sec...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-7508, CVE-2017-7520, CVE-2017-7521, CVE-2017-7522
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: 1463643 1463644
Blocks: Embargoed1463872
TreeView+ depends on / blocked
 
Reported: 2017-06-21 12:17 UTC by Adam Mariš
Modified: 2021-02-17 02:00 UTC (History)
6 users (show)

Fixed In Version: openvpn 2.4.3, openvpn 2.3.17
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2017-08-24 09:22:52 UTC

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Description Adam Mariš 2017-06-21 12:17:09 UTC 
Multiple security issues were fixed in OpenVPN 2.4.3 and 2.3.17, specifically:

CVE-2017-7508: Remotely-triggerable ASSERT() on malformed IPv6 packet

https://github.com/OpenVPN/openvpn/commit/c3f47077a7

CVE-2017-7520: Pre-authentication remote crash/information disclosure for clients

https://github.com/OpenVPN/openvpn/commit/7718c8984f

CVE-2017-7521: Issues in extract_x509_extension() leading to server memory drain/crash/double-free

https://github.com/OpenVPN/openvpn/commit/cb4e35ece4
https://github.com/OpenVPN/openvpn/commit/2d032c7fcd

CVE-2017-7522: Post-authentication remote DoS when using the --x509-track option

https://github.com/OpenVPN/openvpn/commit/426392940c

External References:

https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243
https://guidovranken.wordpress.com/2017/06/21/the-openvpn-post-audit-bug-bonanza/
Comment 1 Adam Mariš 2017-06-21 12:17:28 UTC 
Acknowledgments:

Name: the OpenVPN project
Upstream: Guido Vranken
Comment 2 Adam Mariš 2017-06-21 12:17:50 UTC 
Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 1463644]
Affects: fedora-all [bug 1463643]
Comment 9 Vincent Danen 2017-06-23 17:03:51 UTC 
Statement:

This issue does not affect Red Hat Enterprise Linux 5, 6 and 7 as OpenVPN is not included in any of Red Hat's supported products.
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