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Advisories

FreeRDP - Use-After-Free via Race Condition in DRDYNVC Channel Callback

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severity
high
date
Affecting

  • FreeRDP >= 0, < 3.22.0

CWE
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Credit
jeremylaratro
Description
FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can trigger a race condition by sending DYNVC_DATA and DYNVC_CLOSE messages concurrently, causing heap-use-after-free in the drdynvc client thread and potentially enabling remote code execution or denial of service.

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