FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.
CVSS Details
- CVSS 4.0 Base Score: 5 (MEDIUM)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade libwinprUpgrade freerdp-develUpgrade libwinpr-develUpgrade freerdpUpgrade freerdp-libsUpgrade freerdp-debuginfo | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade freerdp-debugsourceUpgrade libwinpr-develUpgrade freerdpUpgrade freerdp-debuginfoUpgrade freerdp-libs-debuginfoUpgrade freerdp-libsUpgrade freerdp-server-debuginfoUpgrade freerdp-develUpgrade freerdp-serverUpgrade libwinprUpgrade libwinpr-debuginfo | Apr 7, 2026 | Feb 25, 2026 |
| Debian | — | Upgrade freerdp3 | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Feb 25, 2026 |
| Ubuntu | — | Upgrade libfreerdp3-3 | Mar 19, 2026 | Feb 25, 2026 |
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