SB2021072503 - Security restrictoins bypass in wolfssl
Published: July 25, 2021
Security Bulletin ID
SB2021072503
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Security features bypass (CVE-ID: N/A)
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.
Remediation
Install update from vendor's website.