CVE-2023-52456

In the Linux kernel, the following vulnerability has been resolved: serial: imx: fix tx statemachine deadlock When using the serial port as RS485 port, the tx statemachine is used to control the RTS pin to drive the RS485 transceiver TX_EN pin. When the TTY port is closed in the middle of a transmission (for instance during userland application crash), imx_uart_shutdown disables the interface and disables the Transmission Complete interrupt. afer that, imx_uart_stop_tx bails on an incomplete transmission, to be retriggered by the TC interrupt. This interrupt is disabled and therefore the tx statemachine never transitions out of SEND. The statemachine is in deadlock now, and the TX_EN remains low, making the interface useless. imx_uart_stop_tx now checks for incomplete transmission AND whether TC interrupts are enabled before bailing to be retriggered. This makes sure the state machine handling is reached, and is properly set to WAIT_AFTER_SEND.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06	Patch
https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda	Patch
https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181	Patch
https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0	Patch
https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b	Patch
https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19	Patch
https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06	Patch
https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda	Patch
https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181	Patch
https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0	Patch
https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b	Patch
https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19	Patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

21 Nov 2024, 08:39

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html -
References	~~() https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06 - Patch~~	() https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06 - Patch
References	~~() https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda - Patch~~	() https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda - Patch
References	~~() https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181 - Patch~~	() https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181 - Patch
References	~~() https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0 - Patch~~	() https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0 - Patch
References	~~() https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b - Patch~~	() https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b - Patch
References	~~() https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19 - Patch~~	() https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19 - Patch

04 Nov 2024, 13:16

Type	Values Removed	Values Added
References	~~{'url': 'https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html', 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}~~

25 Jun 2024, 21:15

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html -

30 Apr 2024, 19:34

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06 -~~	() https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06 - Patch
References	~~() https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda -~~	() https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda - Patch
References	~~() https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181 -~~	() https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181 - Patch
References	~~() https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0 -~~	() https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0 - Patch
References	~~() https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b -~~	() https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b - Patch
References	~~() https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19 -~~	() https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19 - Patch
CPE		cpe:2.3:o:linux:linux_kernel::::::::
First Time		Linux linux Kernel Linux
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: imx: corrige el punto muerto de la máquina de estado tx Cuando se usa el puerto serie como puerto RS485, la máquina de estado tx se usa para controlar el pin RTS para controlar el pin TX_EN del transceptor RS485. Cuando el puerto TTY se cierra en medio de una transmisión (por ejemplo, durante una falla de la aplicación en el área de usuario), imx_uart_shutdown deshabilita la interfaz y deshabilita la interrupción de transmisión completa. Después de eso, imx_uart_stop_tx abandona una transmisión incompleta, para ser reactivada por la interrupción de TC. Esta interrupción está deshabilitada y, por lo tanto, la máquina de estados tx nunca sale de ENVIAR. La máquina de estados ahora está en punto muerto y TX_EN permanece bajo, lo que hace que la interfaz sea inútil. imx_uart_stop_tx ahora verifica si hay transmisiones incompletas Y si las interrupciones TC están habilitadas antes de volver a activar el rescate. Esto garantiza que se alcance el estado de manejo de la máquina y que esté configurado correctamente en WAIT_AFTER_SEND.
CWE		CWE-667

23 Feb 2024, 15:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-02-23 15:15

Updated : 2024-11-21 08:39

NVD link : CVE-2023-52456

Mitre link : CVE-2023-52456

CVE.ORG link : CVE-2023-52456

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

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When the\nTTY port is closed in the middle of a transmission (for instance during\nuserland application crash), imx_uart_shutdown disables the interface\nand disables the Transmission Complete interrupt. afer that,\nimx_uart_stop_tx bails on an incomplete transmission, to be retriggered\nby the TC interrupt. This interrupt is disabled and therefore the tx\nstatemachine never transitions out of SEND. The statemachine is in\ndeadlock now, and the TX_EN remains low, making the interface useless.\n\nimx_uart_stop_tx now checks for incomplete transmission AND whether TC\ninterrupts are enabled before bailing to be retriggered. This makes sure\nthe state machine handling is reached, and is properly set to\nWAIT_AFTER_SEND."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: imx: corrige el punto muerto de la m\u00e1quina de estado tx Cuando se usa el puerto serie como puerto RS485, la m\u00e1quina de estado tx se usa para controlar el pin RTS para controlar el pin TX_EN del transceptor RS485. Cuando el puerto TTY se cierra en medio de una transmisi\u00f3n (por ejemplo, durante una falla de la aplicaci\u00f3n en el \u00e1rea de usuario), imx_uart_shutdown deshabilita la interfaz y deshabilita la interrupci\u00f3n de transmisi\u00f3n completa. Despu\u00e9s de eso, imx_uart_stop_tx abandona una transmisi\u00f3n incompleta, para ser reactivada por la interrupci\u00f3n de TC. Esta interrupci\u00f3n est\u00e1 deshabilitada y, por lo tanto, la m\u00e1quina de estados tx nunca sale de ENVIAR. La m\u00e1quina de estados ahora est\u00e1 en punto muerto y TX_EN permanece bajo, lo que hace que la interfaz sea in\u00fatil. imx_uart_stop_tx ahora verifica si hay transmisiones incompletas Y si las interrupciones TC est\u00e1n habilitadas antes de volver a activar el rescate. Esto garantiza que se alcance el estado de manejo de la m\u00e1quina y que est\u00e9 configurado correctamente en WAIT_AFTER_SEND."}], "lastModified": "2024-11-21T08:39:48.623", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CDB2CF71-A47E-4390-B675-6597A78D6ADE", "versionEndExcluding": "5.10.209", "versionStartIncluding": "5.9.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E25E1389-4B0F-407A-9C94-5908FF3EE88B", "versionEndExcluding": "5.15.148", "versionStartIncluding": "5.11.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2C4951FA-80C0-4B4C-9836-6E5035DEB0F9", "versionEndExcluding": "6.1.75", "versionStartIncluding": "5.16.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BDBBEB0E-D13A-4567-8984-51C5375350B9", "versionEndExcluding": "6.6.14", "versionStartIncluding": "6.2.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0EA3778C-730B-464C-8023-18CA6AC0B807", "versionEndExcluding": "6.7.2", "versionStartIncluding": "6.7.0"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}

5.5 /10