A vulnerability classified as problematic was found in Apache Guacamole up to 1.5.3. Affected by this vulnerability is an unknown code of the component VNC Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Apache Guacamole 1.5.3 and older do not consistently ensure that values received from a VNC server will not result in integer overflow. If a user connects to a malicious or compromised VNC server, specially-crafted data could result in memory corruption, possibly allowing arbitrary code to be executed with the privileges of the running guacd process. Users are recommended to upgrade to version 1.5.4, which fixes this issue.

The weakness was published 12/19/2023. It is possible to read the advisory at lists.apache.org. This vulnerability is known as CVE-2023-43826 since 09/25/2023. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/13/2024).

Upgrading to version 1.5.4 eliminates this vulnerability.

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Vendor

• Apache

Name

• Guacamole

Version

• 1.5.0
• 1.5.1
• 1.5.2
• 1.5.3

License

• open-source

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