Vulnerability identifier: #VU55288
Vulnerability risk: Medium
CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-254
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
wolfSSL
Universal components / Libraries /
Libraries used by multiple products
Vendor: wolfSSL
Description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to improper validation of OCSP checks, when processing responses for a certificate with no relation to the chain in question and that response contains the NoCheck extension which effectively disables ALL verification of that one cert. A remote attacker can bypass implemented OCSP checks and gain unauthorized access to the system that relies on OCSP verification.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
wolfSSL: 4.0 - 4.8.0
External links
http://github.com/wolfSSL/wolfssl/releases/tag/v4.8.1-stable
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.