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Date: Tue, 6 Jun 2023 10:12:29 -0700
From: Michael Jumper <>
Subject: [SECURITY] CVE-2023-30576: Apache Guacamole: Use-after-free in
 handling of RDP audio input buffer

Severity: moderate
Base CVSS Score: 6.8 (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N)

Affected versions:

- Apache Guacamole 0.9.10 through 1.5.1


Apache Guacamole 0.9.10 through 1.5.1 may continue to reference a freed 
RDP audio input buffer. Depending on timing, this may allow an attacker 
to execute arbitrary code with the privileges of the guacd process.


Users of versions of Apache Guacamole 1.5.1 and older should upgrade to 
the 1.5.2 release.


We would like to thank Stefan Schiller (Sonar) for reporting this issue.



2023-04-11: Reported to
2023-04-11: Report acknowledged by project
2023-04-12: Report confirmed by project
2023-05-09: Fix completed and merged
2023-05-09: Fix tested and confirmed by reporter
2023-05-25: Fix released

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