Apache · Apache Druid · CVE-2024-45384
**Name of the Vulnerable Software and Affected Versions**
Apache Druid versions 0.18.0 through 30.0.0
**Description**
The issue is a Padding Oracle vulnerability in the Apache Druid extension, druid-pac4j, which could allow an attacker to manipulate a pac4j session cookie. Since the druid-pac4j extension is optional and disabled by default, Druid installations not using the druid-pac4j extension are not affected by this issue. While there is no known way to meaningfully exploit this flaw, it is recommended to take precautions.
**Recommendations**
For Apache Druid versions 0.18.0 through 30.0.0, upgrade to version 30.0.1 or higher to fix the issue.
Ensure a strong `druid.auth.pac4j.cookiePassphrase` is set as a precaution.