In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.4.2604.3, 10.3.2512.12, 10.2.2510.14, 10.1.2507.22, and 9.3.2411.132, a low-privileged user that does not hold the “admin” or “power” Splunk roles could send server-side requests to arbitrary internal destinations through the Dashboard Studio PDF export feature.
The vulnerability exists because the trusted-domain validation uses a prefix match that can be bypassed with attacker-controlled subdomains (for example, docs.splunk.com.evil.com), and because the PDF export service follows HTTP redirects automatically without re-validating each redirect target against the allowlist.
See Secure Splunk Enterprise and Dashboard Studio in the Splunk documentation for more information.
Upgrade Splunk Enterprise to versions 10.4.0, 10.2.4, 10.0.7, 9.4.12, and 9.3.13, or higher. Splunk is actively monitoring and patching Splunk Cloud Platform instances.
Splunk rates this vulnerability a 7.6, High, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.
M Mahdan Argya Syarif (0xbeludan)
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