Vulnerability identifier: #VU55417

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-30640

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in the JNDI Realm when processing authentication requests. A remote attacker can authenticate using variations of a valid user name and bypass some of the protection provided by the LockOut Realm.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 10.0.0 - 10.0.5, 9.0.0 - 9.0.45, 8.5.0 - 8.5.65, 7.0.0 - 7.0.108

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CPE

• cpe:2.3:a:apache_foundation:apache_tomcat:10.0.5:*:*:*:*:*:*:*

External links
http://lists.apache.org/thread.html/r59f9ef03929d32120f91f4ea7e6e79edd5688d75d0a9b65fd26d1fe8%40%3Cannounce.tomcat.apache.org%3E

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?