Amazon Linux 2023 Security Advisory: ALAS2023-2026-1643
Advisory Released Date: 2026-05-14
Advisory Updated Date: 2026-05-14
Severity:
Medium
Issue Overview:
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. (CVE-2026-40254)
Affected Packages:
freerdp
Issue Correction:
Run dnf update freerdp --releasever 2023.11.20260511 or dnf update --advisory ALAS2023-2026-1643 --releasever 2023.11.20260511 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
freerdp-libs-debuginfo-3.6.3-1.amzn2023.0.11.aarch64
freerdp-server-debuginfo-3.6.3-1.amzn2023.0.11.aarch64
libwinpr-devel-3.6.3-1.amzn2023.0.11.aarch64
freerdp-server-3.6.3-1.amzn2023.0.11.aarch64
libwinpr-3.6.3-1.amzn2023.0.11.aarch64
libwinpr-debuginfo-3.6.3-1.amzn2023.0.11.aarch64
freerdp-devel-3.6.3-1.amzn2023.0.11.aarch64
freerdp-debuginfo-3.6.3-1.amzn2023.0.11.aarch64
freerdp-3.6.3-1.amzn2023.0.11.aarch64
freerdp-libs-3.6.3-1.amzn2023.0.11.aarch64
freerdp-debugsource-3.6.3-1.amzn2023.0.11.aarch64
src:
freerdp-3.6.3-1.amzn2023.0.11.src
x86_64:
freerdp-server-debuginfo-3.6.3-1.amzn2023.0.11.x86_64
freerdp-libs-debuginfo-3.6.3-1.amzn2023.0.11.x86_64
freerdp-debuginfo-3.6.3-1.amzn2023.0.11.x86_64
libwinpr-debuginfo-3.6.3-1.amzn2023.0.11.x86_64
freerdp-debugsource-3.6.3-1.amzn2023.0.11.x86_64
freerdp-3.6.3-1.amzn2023.0.11.x86_64
freerdp-libs-3.6.3-1.amzn2023.0.11.x86_64
freerdp-server-3.6.3-1.amzn2023.0.11.x86_64
freerdp-devel-3.6.3-1.amzn2023.0.11.x86_64
libwinpr-devel-3.6.3-1.amzn2023.0.11.x86_64
libwinpr-3.6.3-1.amzn2023.0.11.x86_64