Log Injection through HTTP Request Paths in Splunk SOAR

Description

In Splunk SOAR (Security Orchestration, Automation, and Response) versions below 8.5.0, an unauthenticated attacker could inject American National Standards Institute (ANSI) escape codes into SOAR application log files through specially crafted HTTP request paths, which a terminal emulator might interpret when an administrator views the logs.

The injection is possible because SOAR does not strip control characters from HTTP request paths before writing them to application logs.

Solution

Upgrade Splunk SOAR to versions 8.5.0, or higher.

Splunk is actively monitoring and patching Splunk SOAR on Splunk Cloud Platform instances.

Product Status

Mitigations and Workarounds

None

Detections

None

Severity

Splunk rates this vulnerability a 4.3, Medium, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Acknowledgments

STÖK / Fredrik Alexandersson