cve-2024-35825
Vulnerability from cvelistv5
Published
2024-05-17 13:27
Modified
2024-11-05 09:23
Severity ?
Summary
usb: gadget: ncm: Fix handling of zero block length packets
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b2c73111a252263807b7598682663dc33aa4b4c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7664ee8bd80309b90d53488b619764f0a057f2b7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92b051b87658df7649ffcdef522593f21a2b296b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0f77b5d6067285b8eca0ee3bd1e448a6258026f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a766761d206e7c36d7526e0ae749949d17ca582c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2dbfea520e60d58e0c498ba41bde10452257779
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef846cdbd100f7f9dc045e8bcd7fe4b3a3713c03
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f90ce1e04cbcc76639d6cba0fdbd820cd80b3c70
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6b2c73111a252263807b7598682663dc33aa4b4c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7664ee8bd80309b90d53488b619764f0a057f2b7
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/92b051b87658df7649ffcdef522593f21a2b296b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a0f77b5d6067285b8eca0ee3bd1e448a6258026f
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a766761d206e7c36d7526e0ae749949d17ca582c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e2dbfea520e60d58e0c498ba41bde10452257779
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ef846cdbd100f7f9dc045e8bcd7fe4b3a3713c03
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f90ce1e04cbcc76639d6cba0fdbd820cd80b3c70
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Impacted products
Vendor Product Version
Linux Linux Version: 6.6
Show details on NVD website

To clipboard 

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If\\nexactly dwNtbInMaxSize or dwNtbOutMaxSize bytes are sent,\\nand the size is a multiple of wMaxPacketSize for the\\ngiven pipe, then no ZLP shall be sent.\\n\\nwBlockLength= 0x0000 must be used with extreme care, because\\nof the possibility that the host and device may get out of\\nsync, and because of test issues.\\n\\nwBlockLength = 0x0000 allows the sender to reduce latency by\\nstarting to send a very large NTB, and then shortening it when\\nthe sender discovers that there\u2019s not sufficient data to justify\\nsending a large NTB\\\"\\n\\nHowever, there is a potential issue with the current implementation,\\nas it checks for the occurrence of multiple NTBs in a single\\ngiveback by verifying if the leftover bytes to be processed is zero\\nor not. If the block length reads zero, we would process the same\\nNTB infintely because the leftover bytes is never zero and it leads\\nto a crash. Fix this by bailing out if block length reads zero.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: gadget: ncm: corregido el manejo de paquetes de longitud de bloque cero Al conectarnos a un host Linux con CDC_NCM_NTB_DEF_SIZE_TX configurado en 65536, se ha observado que recibimos paquetes cortos, que vienen en intervalo de 5 a 10 segundos a veces y tiene una longitud de bloque cero, pero a\u00fan contiene 1 o 2 datagramas v\u00e1lidos presentes. Seg\u00fan la especificaci\u00f3n NCM: \\\"Si wBlockLength = 0x0000, el bloque finaliza con un paquete corto. En este caso, la transferencia USB a\u00fan debe ser m\u00e1s corta que dwNtbInMaxSize o dwNtbOutMaxSize. Si se env\u00edan exactamente bytes dwNtbInMaxSize o dwNtbOutMaxSize, y el tama\u00f1o es un m\u00faltiplo de wMaxPacketSize para la pipe dada, entonces no se enviar\u00e1 ning\u00fan ZLP. wBlockLength= 0x0000 debe usarse con extremo cuidado, debido a la posibilidad de que el host y el dispositivo no est\u00e9n sincronizados y debido a problemas de prueba con wBlockLength = 0x0000. permite al remitente reducir la latencia comenzando a enviar un NTB muy grande y luego acort\u00e1ndolo cuando el remitente descubre que no hay datos suficientes para justificar el env\u00edo de un NTB grande\\\". Sin embargo, existe un problema potencial con la implementaci\u00f3n actual, ya que verifica para la aparici\u00f3n de m\u00faltiples NTB en una sola devoluci\u00f3n verificando si los bytes sobrantes a procesar son cero o no. Si la longitud del bloque es cero, procesar\u00edamos el mismo NTB infinitamente porque los bytes sobrantes nunca son cero y provocan un bloqueo. 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}


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