A vulnerability was found in openfortivpn 1.11.0. It has been declared as critical. This vulnerability affects the function X509_check_host of the file tunnel.c. The manipulation as part of a Return Value leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL 1.0.2 or later. tunnel.c mishandles certificate validation because an X509_check_host negative error code is interpreted as a successful return value.

The weakness was disclosed 02/27/2020. This vulnerability was named CVE-2020-7041 since 01/14/2020. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/28/2020). The MITRE ATT&CK project declares the attack technique as T1587.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries 150713 and 150714 are pretty similar.

Affected

• OpenSSL 1.0.2

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Name

• openfortivpn

Version

• 1.11.0

License

• open-source

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