Bug 1981494 (CVE-2021-3547) - CVE-2021-3547 openvpn: possible certificate authentication bypass with --verify-x509-name
Summary: CVE-2021-3547 openvpn: possible certificate authentication bypass with --veri...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-3547
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: 1981495 1981496
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-07-12 16:58 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-07-12 17:14 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-07-12 17:14:20 UTC
Embargoed:

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2021-07-12 16:58:02 UTC 
OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration.

Reference:
https://community.openvpn.net/openvpn/wiki/CVE-2021-3547
Comment 1 Guilherme de Almeida Suckevicz 2021-07-12 16:58:26 UTC 
Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 1981496]
Affects: fedora-all [bug 1981495]
Comment 2 David Sommerseth 2021-07-12 17:02:01 UTC 
This does NOT affect the 'openvpn' package.  This is an issue which hits the 'openvpn3-linux' project, which currently only has Fedora Copr repos: https://copr.fedorainfracloud.org/coprs/dsommers/openvpn3/

This issue was resolved with v14_beta which was released 2021-07-08.
https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg22622.html
Note You need to log in before you can comment on or make changes to this bug.