CVE-2021-30640 JNDI Realm Authentication Weakness
Severity: Low
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.5
Apache Tomcat 9.0.0.M1 to 9.0.45
Apache Tomcat 8.5.0 to 8.5.65
Apache Tomcat 7.0.0 to 7.0.108
Description:
Queries made by the JNDI Realm did not always correctly escape
parameters. Parameter values could be sourced from user provided data
(eg user names) as well as configuration data provided by an administrator.
In limited circumstances it was possible for users to authenticate using
variations of their user name and/or to bypass some of the protection
provided by the LockOut Realm.
Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 10.0.6 or later
- Upgrade to Apache Tomcat 9.0.46 or later
- Upgrade to Apache Tomcat 8.5.66 or later
- Upgrade to Apache Tomcat 7.0.109 or later
History:
2021-07-12 Original advisory
References:
[1] https://tomcat.apache.org/security-10.html
[2] https://tomcat.apache.org/security-9.html
[3] https://tomcat.apache.org/security-8.html
[4] https://tomcat.apache.org/security-7.html
