SB2018072101 - Certificate authentication bypass in Apache Tomcat Native Connector

Description

This security bulletin contains information about 2 vulnerabilities.

1) Authentication bypass (CVE-ID: CVE-2018-8019)

CWE-ID: CWE-592 - Authentication Bypass Issues

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to bypass OCSP checks.

The vulnerability exists in the OCSP responder implementation in Apache Tomcat APR/native Connector that does not properly identify clients with revoked certificates. A remote attacker can bypass  authentication and successfully authenticate with a revoked certificate when using mutual TLS.

2) Authentication bypass (CVE-ID: CVE-2018-8020)

CWE-ID: CWE-592 - Authentication Bypass Issues

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to bypass OCSP checks.

The vulnerability exists in the OCSP responder implementation in Apache Tomcat APR/native Connector that does not properly check OCSP pre-produced responses. A remote attacker can bypass  authentication and successfully authenticate with a revoked certificate when using mutual TLS.

Remediation

Install update from vendor's website.

References

• http://svn.apache.org/viewvc?view=rev&rev=1832832
• https://tomcat.apache.org/security-native.html
• http://svn.apache.org/viewvc?view=rev&rev=1832863