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fstec логотип

BDU:2026-04439

Опубликовано: 14 июл. 2023
Источник: fstec
CVSS3: 5.5
CVSS2: 4.6
EPSS Низкий

Описание

Уязвимость функции cifs_demultiplex_thread() модуля fs/smb/client/connect.c поддержки клиента SMB ядра операционной системы Linux связана с неправильным освобождением памяти («утечка памяти»). Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании

Вендор

Red Hat Inc.
Canonical Ltd.
Сообщество свободного программного обеспечения

Наименование ПО

Red Hat Enterprise Linux
Ubuntu
Debian GNU/Linux
Linux

Версия ПО

8 (Red Hat Enterprise Linux)
20.04 LTS (Ubuntu)
12 (Debian GNU/Linux)
22.04 LTS (Ubuntu)
9 (Red Hat Enterprise Linux)
от 5.16 до 6.1.41 включительно (Linux)
от 6.2 до 6.4.6 включительно (Linux)
от 5.9.5 до 5.15.149 включительно (Linux)

Тип ПО

Операционная система

Операционные системы и аппаратные платформы

Red Hat Inc. Red Hat Enterprise Linux 8
Canonical Ltd. Ubuntu 20.04 LTS
Сообщество свободного программного обеспечения Debian GNU/Linux 12
Canonical Ltd. Ubuntu 22.04 LTS
Red Hat Inc. Red Hat Enterprise Linux 9
Сообщество свободного программного обеспечения Linux от 5.16 до 6.1.41 включительно
Сообщество свободного программного обеспечения Linux от 6.2 до 6.4.6 включительно
Сообщество свободного программного обеспечения Linux от 5.9.5 до 5.15.149 включительно

Уровень опасности уязвимости

Средний уровень опасности (базовая оценка CVSS 2.0 составляет 4,6)
Средний уровень опасности (базовая оценка CVSS 3.1 составляет 5,5)

Возможные меры по устранению уязвимости

В условиях отсутствия обновлений безопасности от производителя рекомендуется придерживаться "Рекомендаций по безопасной настройке операционных систем LINUX", изложенных в методическом документе ФСТЭК России, утверждённом 25 декабря 2022 года.
Использование рекомендаций:
Для Linux:
https://git.kernel.org/stable/c/df31d05f0678cdd0796ea19983a2b93edca18bb0
https://git.kernel.org/stable/c/c55901d381a22300c9922170e59704059f50977b
https://git.kernel.org/stable/c/57d25e9905c71133e201f6d06b56a3403d4ad433
https://git.kernel.org/linus/69cba9d3c1284e0838ae408830a02c4a063104bc
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.150
https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.42
https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.7
Для Debian GNU/Linux:
https://security-tracker.debian.org/tracker/CVE-2023-53597
Для программных продуктов Red Hat Inc.:
https://access.redhat.com/security/cve/cve-2023-53597
Для Ubuntu:
https://ubuntu.com/security/CVE-2023-53597

Статус уязвимости

Подтверждена производителем

Наличие эксплойта

Данные уточняются

Информация об устранении

Уязвимость устранена

Идентификаторы других систем описаний уязвимостей

EPSS

Процентиль: 18%
0.00263
Низкий

5.5 Medium

CVSS3

4.6 Medium

CVSS2

Связанные уязвимости

CVSS3: 7.5
ubuntu
10 месяцев назад

In the Linux kernel, the following vulnerability has been resolved: cifs: fix mid leak during reconnection after timeout threshold When the number of responses with status of STATUS_IO_TIMEOUT exceeds a specified threshold (NUM_STATUS_IO_TIMEOUT), we reconnect the connection. But we do not return the mid, or the credits returned for the mid, or reduce the number of in-flight requests. This bug could result in the server->in_flight count to go bad, and also cause a leak in the mids. This change moves the check to a few lines below where the response is decrypted, even of the response is read from the transform header. This way, the code for returning the mids can be reused. Also, the cifs_reconnect was reconnecting just the transport connection before. In case of multi-channel, this may not be what we want to do after several timeouts. Changed that to reconnect the session and the tree too. Also renamed NUM_STATUS_IO_TIMEOUT to a more appropriate name MAX_STATUS_IO_TIMEOUT.

CVSS3: 5.5
redhat
10 месяцев назад

In the Linux kernel, the following vulnerability has been resolved: cifs: fix mid leak during reconnection after timeout threshold When the number of responses with status of STATUS_IO_TIMEOUT exceeds a specified threshold (NUM_STATUS_IO_TIMEOUT), we reconnect the connection. But we do not return the mid, or the credits returned for the mid, or reduce the number of in-flight requests. This bug could result in the server->in_flight count to go bad, and also cause a leak in the mids. This change moves the check to a few lines below where the response is decrypted, even of the response is read from the transform header. This way, the code for returning the mids can be reused. Also, the cifs_reconnect was reconnecting just the transport connection before. In case of multi-channel, this may not be what we want to do after several timeouts. Changed that to reconnect the session and the tree too. Also renamed NUM_STATUS_IO_TIMEOUT to a more appropriate name MAX_STATUS_IO_TIMEOUT.

CVSS3: 7.5
nvd
10 месяцев назад

In the Linux kernel, the following vulnerability has been resolved: cifs: fix mid leak during reconnection after timeout threshold When the number of responses with status of STATUS_IO_TIMEOUT exceeds a specified threshold (NUM_STATUS_IO_TIMEOUT), we reconnect the connection. But we do not return the mid, or the credits returned for the mid, or reduce the number of in-flight requests. This bug could result in the server->in_flight count to go bad, and also cause a leak in the mids. This change moves the check to a few lines below where the response is decrypted, even of the response is read from the transform header. This way, the code for returning the mids can be reused. Also, the cifs_reconnect was reconnecting just the transport connection before. In case of multi-channel, this may not be what we want to do after several timeouts. Changed that to reconnect the session and the tree too. Also renamed NUM_STATUS_IO_TIMEOUT to a more appropriate name MAX_STATUS_IO_TIMEOUT.

CVSS3: 7.5
debian
10 месяцев назад

In the Linux kernel, the following vulnerability has been resolved: c ...

CVSS3: 5.5
github
10 месяцев назад

In the Linux kernel, the following vulnerability has been resolved: cifs: fix mid leak during reconnection after timeout threshold When the number of responses with status of STATUS_IO_TIMEOUT exceeds a specified threshold (NUM_STATUS_IO_TIMEOUT), we reconnect the connection. But we do not return the mid, or the credits returned for the mid, or reduce the number of in-flight requests. This bug could result in the server->in_flight count to go bad, and also cause a leak in the mids. This change moves the check to a few lines below where the response is decrypted, even of the response is read from the transform header. This way, the code for returning the mids can be reused. Also, the cifs_reconnect was reconnecting just the transport connection before. In case of multi-channel, this may not be what we want to do after several timeouts. Changed that to reconnect the session and the tree too. Also renamed NUM_STATUS_IO_TIMEOUT to a more appropriate name MAX_STATUS_IO_TIMEOUT.

EPSS

Процентиль: 18%
0.00263
Низкий

5.5 Medium

CVSS3

4.6 Medium

CVSS2