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AUSCERT External Security Bulletin Redistribution
ESB-2020.2288
Improper input validation of RDP static virtual channels
3 July 2020
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AusCERT Security Bulletin Summary
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Product: Apache Guacamole
Publisher: Apache
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Unknown/Unspecified
Resolution: Patch/Upgrade
CVE Names: CVE-2020-9497
Original Bulletin:
https://www.mail-archive.com/announce@apache.org/msg05965.html
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CVE-2020-9497: Improper input validation of RDP static virtual channels
Versions affected:
Apache Guacamole 1.1.0 and earlier
Description:
Apache Guacamole 1.1.0 and older do not properly validate data
received from RDP servers via static virtual channels. If a user
connects to a malicious or compromised RDP server, specially-crafted
PDUs could result in disclosure of information within the memory of
the guacd process handling the connection.
Mitigation:
Users of versions of Apache Guacamole 1.1.0 and older that provide
access to untrusted RDP servers should upgrade to 1.2.0.
Credit:
We would like to thank the GitHub Security Lab and Eyal Itkin (Check
Point Research) for reporting this issue.
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