Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, global-buffer-overflow was observed in FreeRDP's Base64 decoding path. The root cause appears to be implementation-defined char signedness: on Arm/AArch64 builds, plain char is treated as unsigned, so the guard c <= 0 can be optimized into a simple c != 0 check. As a result, non-ASCII bytes (e.g., 0x80-0xFF) may bypass the intended range restriction and be used as an index into a global lookup table, causing out-of-bounds access. This vulnerability is fixed in 3.20.1.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| freerdp | โ | 3.20.1 |
References
Similar Threats
- Unknown ALSA-2026:16482
- Unknown ALSA-2026:16014
- Unknown ALSA-2026:16019
- Unknown ALSA-2026:6799
- Unknown ALSA-2026:6340
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