xrdp up to 0.9.23.0 xrdp_painter.c out-of-bounds

Summaryinfo

A vulnerability classified as problematic was found in xrdp up to 0.9.23.0. The affected element is an unknown function of the file xrdp_painter.c. Executing a manipulation can lead to out-of-bounds. This vulnerability is registered as CVE-2023-42822. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in xrdp up to 0.9.23.0. It has been declared as problematic. This vulnerability affects an unknown function of the file xrdp_painter.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

xrdp is an open source remote desktop protocol server. Access to the font glyphs in xrdp_painter.c is not bounds-checked . Since some of this data is controllable by the user, this can result in an out-of-bounds read within the xrdp executable. The vulnerability allows an out-of-bounds read within a potentially privileged process. On non-Debian platforms, xrdp tends to run as root. Potentially an out-of-bounds write can follow the out-of-bounds read. There is no denial-of-service impact, providing xrdp is running in forking mode. This issue has been addressed in release 0.9.23.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

The weakness was published 09/27/2023 as GHSA-2hjx-rm4f-r9hw. The advisory is available at github.com. This vulnerability was named CVE-2023-42822 since 09/14/2023. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 236872 (Debian dla-4166 : xrdp - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.9.23.1 eliminates this vulnerability. Applying the patch 73acbe1f7957c65122b00de4d6f57a8d0d257c40 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (236872). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• xrdp

Version

• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3
• 0.9.4
• 0.9.5
• 0.9.6
• 0.9.7
• 0.9.8
• 0.9.9
• 0.9.10
• 0.9.11
• 0.9.12
• 0.9.13
• 0.9.14
• 0.9.15
• 0.9.16
• 0.9.17
• 0.9.18
• 0.9.19
• 0.9.20
• 0.9.21
• 0.9.22
• 0.9.23.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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