1831686 – (CVE-2020-7043) CVE-2020-7043 openfortivpn: mishandling of certificate validation

Bug 1831686 (CVE-2020-7043) - CVE-2020-7043 openfortivpn: mishandling of certificate validation

Summary: CVE-2020-7043 openfortivpn: mishandling of certificate validation

Keywords:
Status:	CLOSED NOTABUG
Alias:	CVE-2020-7043
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Red Hat Product Security
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2020-05-05 13:40 UTC by Dhananjay Arunesh
Modified:	2021-10-28 05:25 UTC (History)
CC List:	2 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:	2021-10-28 05:25:53 UTC
Embargoed:

Attachments	(Terms of Use)

Description Dhananjay Arunesh 2020-05-05 13:40:25 UTC

An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL before 1.0.2. tunnel.c mishandles certificate validation because hostname comparisons do not consider '\0' characters, as demonstrated by a good.example.com\x00evil.example.com attack.

References:
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00011.html
https://github.com/adrienverge/openfortivpn/commit/cd9368c6a1b4ef91d77bb3fdbe2e5bc34aa6f4c4
https://github.com/adrienverge/openfortivpn/issues/536
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FF6HYIBREQGATRM5COF57MRQWKOKCWZ3/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SRVVNXCNTNMPCIAZIVR4FAGYCSU53FNA/

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