CVE-2023-39352

FreeRDP es una implementación gratuita del Protocolo de escritorio remoto (RDP), publicada bajo la licencia Apache. Las versiones afectadas están sujetas a una validación de compensación no válida que conduce a una escritura fuera de límites. Esto se puede activar cuando los valores `rect->left` y `rect->top` son exactamente iguales a `surface->width` y `surface->height`. p.ej. `rect->izquierda` == `superficie->ancho` && `rect->top` == `superficie->alto`. En la práctica, esto debería provocar un bloqueo. Este problema se solucionó en las versiones 2.11.0 y 3.0.0-beta3. Se recomienda a los usuarios que actualicen. No se conocen soluciones para esta vulnerabilidad.

A flaw was found in FreeRDP. An out-of-bounds write may occur when the values `rect->left` and `rect->top` are exactly equal to `surface->width` and `surface->height`. eg. `rect->left` == `surface->width` && `rect->top` == `surface->height`. This issue can result in a crash.

This update for freerdp fixes the following issues. Fixed incorrect offset calculation leading to DoS. Fixed Null Pointer Dereference leading DoS in RemoteFX. Fixed Invalid offset validation leading to Out Of Bound Write. Fixed Missing offset validation leading to Out Of Bound Read. Fixed Out-Of-Bounds Read in nsc_rle_decompress_data. Fixed Missing offset validation leading to Out-of-Bounds Read in gdi_multi_opaque_rect. Fixed Integer-Underflow leading to Out-Of-Bound Read in zgfx_decompress_segment. Fixed IntegerOverflow leading to Out-Of-Bound Write Vulnerability in gdi_CreateSurface. Fixed Out-Of-Bounds Read in general_LumaToYUV444. Fixed Out-Of-Bounds Write in clear_decompress_bands_data. Fixed Out-Of-Bounds Write in progressive_decompress. Fixed Out-Of-Bounds Write in general_YUV444ToRGB_8u_P3AC4R_BGRX. Fixed Out-Of-Bounds Read in general_YUV444ToRGB_8u_P3AC4R_BGRX. Fixed Out-Of-Bounds Read in RleDecompress. Fixed Global-Buffer-Overflow in ncrush_decompress.