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             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.3149
             SVD-2023-0607: Local Privilege Escalation via the
               ?streamfwd? program in Splunk App for Stream
                                2 June 2023

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Splunk App for Stream
Publisher:         Splunk
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-32713  

Original Bulletin: 
   https://advisory.splunk.com//advisories/SVD-2023-0607

Comment: CVSS (Max):  7.8 CVE-2023-32713 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H)
         CVSS Source: Splunk
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

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Local Privilege Escalation via the 'streamfwd' program in Splunk App for Stream

Advisory ID: SVD-2023-0607

CVE ID: CVE-2023-32713

Published: 2023-06-01

Last Update: 2023-06-01

CVSSv3.1 Score: 7.8, High

CVSSv3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE: CWE-269

Bug ID: STREAM-5290

Description

A low-privileged user could use a vulnerability in the streamfwd process within
the Splunk App for Stream to escalate their privileges on the machine that runs
the Splunk Enterprise instance, up to and including the root user.

Solution

Upgrade the Splunk App for Stream to version 8.1.1 or higher.

Product Status

       Product        Version Component Affected Version Fix Version
Splunk App for Stream 8.1     streamfwd 8.1 and lower    8.1.1

Mitigations and Workarounds

  o Install the Splunk App for Stream as a high-privileged user, for example,
    one that has been added to the /etc/sudoers file on the machine that runs
    the instance (on machines that run *nix).
  o Limit user access to the 'streamfwd' process by removing all but privileged
    users' ability to run the process.
  o Disable the Splunk App for Stream if you do not require it and cannot
    upgrade it.

Detections

None

Severity

Splunk rated the vulnerability as High, 7.8 with a CVSSv3.1 vector of CVSS:3.1/
AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

If the instance does not run the Splunk App for Stream, then there is no impact
and the severity is Informational.

Acknowledgments

Ben Leonard-Lagarde & Lucas Fedyniak-Hopes (Modux)

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===========================================================================
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