ppkarwasz opened a new issue, #1947:
URL: https://github.com/apache/logging-log4j2/issues/1947
## Description
The Flume appender uses:
```java
Cipher.getInstance("AES");
```
to encrypt messages
In the default [Oracle security
providers](https://docs.oracle.com/en/java/javase/17/security/oracle-providers.html#GUID-BC92B7F1-D15C-432A-B725-9BBA9FEF61DB)
this uses `ECB` as cipher mode, which:
- does not provide integrity (cf.
[CIPHER_INTEGRITY](https://find-sec-bugs.github.io/bugs.htm#CIPHER_INTEGRITY)),
- does not provide good confidentiality (cf.
[ECB_MODE](https://find-sec-bugs.github.io/bugs.htm#ECB_MODE)).
If Flume supports it, we should replace it with another cipher mode.
Related to #1707.
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