CVE-2022-33980: Apache Commons Configuration insecure interpolation defaults

[Matt Juntunen <mattjuntunen () apache org>]

Severity: Moderate

Description:

Apache Commons Configuration performs variable interpolation, allowing properties to be dynamically evaluated and 
expanded. The standard format for interpolation is "${prefix:name}", where "prefix" is used to locate an instance of 
org.apache.commons.configuration2.interpol.Lookup that performs the interpolation. Starting with version 2.4 and 
continuing through 2.7, the set of default Lookup instances included interpolators that could result in arbitrary code 
execution or contact with remote servers. These lookups are:
- "script" - execute expressions using the JVM script execution engine (javax.script)
- "dns" - resolve dns records
- "url" - load values from urls, including from remote servers

Applications using the interpolation defaults in the affected versions may be vulnerable to remote code execution or 
unintentional contact with remote servers if untrusted configuration values are used.

Users are recommended to upgrade to Apache Commons Configuration 2.8.0, which disables the problematic interpolators by 
default.

Mitigation:

Upgrade to version Apache Commons Configuration 2.8.0