CyberRota Analysis
AI-GeneratedFreeRDP versions prior to 3.29.0 are vulnerable to a heap out-of-bounds read due to improper handling of GLYPH_FRAGMENT_ADD updates, allowing a malicious RDP server to manipulate fragment sizes. This vulnerability can lead to client crashes and potential information leakage by reading beyond allocated memory. Organizations using affected FreeRDP versions should prioritize patching to mitigate the risk of exploitation.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains a heap out-of-bounds read in update_process_glyph_fragments()/glyph_cache_fragment_put() in libfreerdp/cache/glyph.c. When handling a GLYPH_FRAGMENT_ADD update, the code reads a one-byte server-controlled declared fragment size but does not verify it fits within the remaining received buffer before allocating and copying that many bytes. A malicious RDP server can send a short fragment with an oversized declared size, causing the client to read beyond the allocated buffer, resulting in an out-of-bounds read and client crash.