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Category:   Application (VPN)  >   OpenVPN Vendors:   openvpn.net
OpenVPN Packet Processing Flaws Let Remote Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1038473
SecurityTracker URL:  http://securitytracker.com/id/1038473
CVE Reference:   CVE-2017-7478, CVE-2017-7479   (Links to External Site)
Date:  May 12 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   Two vulnerabilities were reported in OpenVPN. A remote user can cause the target service to crash.

A remote user can send a specially crafted P_CONTROL packet to cause cause the target service to crash [CVE-2017-7478].

A remote user can send specially crafted data to cause all available packet-IDs on the target server to be consume, causing the counter to rollover and the service to crash [CVE-2017-7479].

The original advisory is available at:

https://www.privateinternetaccess.com/blog/2017/05/openvpn-2-4-evaluation-summary-report/

Quarkslab and Cryptography Engineering LCC reported these vulnerabilities.

Impact:   A remote user can cause the target service to crash.
Solution:   The vendor has issued a fix (2.3.15, 2.4.2).

The vendor advisory is available at:

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

Vendor URL:  community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 12 2017 (Ubuntu Issues Fix) OpenVPN Packet Processing Flaws Let Remote Users Cause the Target Service to Crash
Ubuntu has issued a fix for Ubuntu Linux 17.04.
Jun 22 2017 (Ubuntu Issues Fix) OpenVPN Packet Processing Flaws Let Remote Users Cause the Target Service to Crash
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS, 16.04 LTS, 16.10, and 17.04.



 Source Message Contents



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