CVE-2023-33008: Apache Johnzon: Prevent inefficient internal conversion from BigDecimal at large scale

["Jean-Louis Monteiro" <jlmonteiro () apache org>]

Severity: important

Affected versions:

- Apache Johnzon through 1.2.20

Description:

Deserialization of Untrusted Data vulnerability in Apache Software Foundation Apache Johnzon.


A malicious attacker can craft up some JSON input that uses large numbers (numbers such as 1e20000000) that Apache 
Johnzon will deserialize into BigDecimal and maybe use numbers too large which may result in a slow conversion (Denial 
of service risk). Apache Johnzon 1.2.21 mitigates this by setting a scale limit of 1000 (by default) to the BigDecimal. 


This issue affects Apache Johnzon: through 1.2.20.

This issue is being tracked as JOHNZON-397 

Credit:

PJ Fanning (reporter)
Jean-Louis Monteiro (remediation developer)
Romain Manni-Bucau (remediation reviewer)

References:

https://johnzon.apache.org/
https://www.cve.org/CVERecord?id=CVE-2023-33008
https://issues.apache.org/jira/browse/JOHNZON-397