Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-40254: FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in `channels/drive/client/drive_file.c`. The `contains_dotdot()` function catches `../` and `..\` mid-path but misses `..` when it's the last component with no trailing separator. A rogue RDP server can read, list, or write files one directory above the client's shared folder through RDPDR requests. This requires the victim to connect with drive redirection enabled. Version 3.25.0 patches the issue.
Fixed packages 11
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | freerdp | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | freerdp-debuginfo | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | freerdp-debugsource | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | freerdp-devel | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | freerdp-libs | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | freerdp-libs-debuginfo | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | freerdp-server | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | freerdp-server-debuginfo | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | libwinpr | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | libwinpr-debuginfo | 2:3.6.3-1.amzn2023.0.11 |
| Amazon Linux · 2023 | libwinpr-devel | 2:3.6.3-1.amzn2023.0.11 |
Vulnerabilities 1
-
Medium 4.2
FreeRDP: contains_dotdot() off-by-one allows drive channel path traversal via terminal ..
FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in `channels/drive/client/drive_file.c`. The `contains_dotdot()` function catches `../` and `..\` mid-path but misses `..…
References
-
web
https://alas.aws.amazon.com/cve/html/CVE-2026-40254.html