Certificate authentication bypass in Apache Tomcat Native Connector

Published: 2018-07-21

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-8019 CVE-2018-8020
CWE-ID	CWE-592
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Apache Tomcat Native Connector Server applications / Other server solutions
Vendor	Apache Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Authentication bypass

EUVDB-ID: #VU13952

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8019

CWE-ID: CWE-592 - Authentication Bypass Issues

Exploit availability: No

Description

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.

Mitigation

Update to version 1.2.17.

Vulnerable software versions

Apache Tomcat Native Connector: 1.1.23 - 1.2.25

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Authentication bypass

EUVDB-ID: #VU13953