Vulnerability-Lookup

BDU:2024-07041 (CVE-2021-4439)

Vulnerability from fstec – Published: 2024-09-16 – Updated: 2024-12-05 – View on bdu.fstec.ru Fixed

Title

Уязвимость функции cmtp_add_connection драйвера /isdn/capi/kcapi.c компонента isdn ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость функции cmtp_add_connection драйвера /isdn/capi/kcapi.c компонента isdn ядра операционной системы Linux связана с выхода индекса массива за пределы диапазона. Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании

Severity

6.8 (Medium) CVSS 2.0


                      
                        AV:L/AC:L/Au:S/C:C/I:C/A:C

7.8 (High) CVSS 3.0


                      
                        CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Resource manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-129 - Непроверенное индексирование массива
CWE-787 - Запись за границами буфера

Aliases

CVE-2021-4439

References

20 references

URL
https://access.redhat.com/security/cve/CVE-2021-4439
https://git.kernel.org/linus/1f3e2e97c003f80c4b087092b225c8787ff91e4d
https://git.kernel.org/stable/c/1f3e2e97c003f80c4b087092b225c8787ff91e4d
https://git.kernel.org/stable/c/24219a977bfe3d658687e45615c70998acdbac5a
https://git.kernel.org/stable/c/285e9210b1fab96a11c0be3ed5cea9dd48b6ac54
https://git.kernel.org/stable/c/7d91adc0ccb060ce564103315189466eb822cc6a
https://git.kernel.org/stable/c/7f221ccbee4ec662e2292d490a43ce6c314c4594
https://git.kernel.org/stable/c/9b6b2db77bc3121fe435f1d4b56e34de443bec75
https://git.kernel.org/stable/c/cc20226e218a2375d50dd9ac14fb4121b43375ff
https://git.kernel.org/stable/c/e8b8de17e164c9f1b7777f1c6f99d05539000036
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.253
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.214
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.290
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.288
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.156
https://lore.kernel.org/linux-cve-announce/2024062001-CVE-2021-4439-59ce@gregkh/
https://vuldb.com/?id.269245
https://www.cve.org/CVERecord?id=CVE-2021-4439

Impacted products

2 products from 3 vendors

Vendors

Red Hat, Inc., Сообщество свободного программного обеспечения

Products

Red Hat Enterprise Linux, Linux

Versions

8 (Red Hat Enterprise Linux), от 4.0 до 4.4.289 включительно (Linux), от 4.5 до 4.9.287 включительно (Linux), от 4.10 до 4.14.252 включительно (Linux), от 4.15 до 4.19.213 включительно (Linux), от 4.20 до 5.4.155 включительно (Linux), от 5.5 до 5.10.75 включительно (Linux), от 5.11 до 5.14.14 включительно (Linux)

Product types

Operating system

Platforms

Red Hat, Inc. Red Hat Enterprise Linux 8, Сообщество свободного программного обеспечения Linux от 4.0 до 4.4.289 включительно, Сообщество свободного программного обеспечения Linux от 4.5 до 4.9.287 включительно, Сообщество свободного программного обеспечения Linux от 4.10 до 4.14.252 включительно, Сообщество свободного программного обеспечения Linux от 4.15 до 4.19.213 включительно, Сообщество свободного программного обеспечения Linux от 4.20 до 5.4.155 включительно, Сообщество свободного программного обеспечения Linux от 5.5 до 5.10.75 включительно, Сообщество свободного программного обеспечения Linux от 5.11 до 5.14.14 включительно

Mitigations

Использование рекомендаций производителя: Для Linux: https://git.kernel.org/linus/1f3e2e97c003f80c4b087092b225c8787ff91e4d https://git.kernel.org/stable/c/1f3e2e97c003f80c4b087092b225c8787ff91e4d https://git.kernel.org/stable/c/24219a977bfe3d658687e45615c70998acdbac5a https://git.kernel.org/stable/c/285e9210b1fab96a11c0be3ed5cea9dd48b6ac54 https://git.kernel.org/stable/c/7d91adc0ccb060ce564103315189466eb822cc6a https://git.kernel.org/stable/c/7f221ccbee4ec662e2292d490a43ce6c314c4594 https://git.kernel.org/stable/c/9b6b2db77bc3121fe435f1d4b56e34de443bec75 https://git.kernel.org/stable/c/cc20226e218a2375d50dd9ac14fb4121b43375ff https://git.kernel.org/stable/c/e8b8de17e164c9f1b7777f1c6f99d05539000036 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.253 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.214 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.290 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.288 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.156 https://lore.kernel.org/linux-cve-announce/2024062001-CVE-2021-4439-59ce@gregkh/ Для программных продуктов Red Hat Inc.: https://access.redhat.com/security/cve/CVE-2021-4439 Компенсирующие меры: - отключение неиспользуемых учетных записей, а также учетных записей недоверенных пользователей; - принудительная смена паролей пользователей; - ограничение доступа к командной строке для недоверенных пользователей; - использование антивирусных средств защиты; - мониторинг действий пользователей.

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:C/I:C/A:C",
  "CVSS 3.0": "AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Red Hat, Inc., \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "8 (Red Hat Enterprise Linux), \u043e\u0442 4.0 \u0434\u043e 4.4.289 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.5 \u0434\u043e 4.9.287 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.10 \u0434\u043e 4.14.252 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.15 \u0434\u043e 4.19.213 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.20 \u0434\u043e 5.4.155 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.5 \u0434\u043e 5.10.75 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.11 \u0434\u043e 5.14.14 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\n\u0414\u043b\u044f Linux:\nhttps://git.kernel.org/linus/1f3e2e97c003f80c4b087092b225c8787ff91e4d\nhttps://git.kernel.org/stable/c/1f3e2e97c003f80c4b087092b225c8787ff91e4d\nhttps://git.kernel.org/stable/c/24219a977bfe3d658687e45615c70998acdbac5a\nhttps://git.kernel.org/stable/c/285e9210b1fab96a11c0be3ed5cea9dd48b6ac54\nhttps://git.kernel.org/stable/c/7d91adc0ccb060ce564103315189466eb822cc6a\nhttps://git.kernel.org/stable/c/7f221ccbee4ec662e2292d490a43ce6c314c4594\nhttps://git.kernel.org/stable/c/9b6b2db77bc3121fe435f1d4b56e34de443bec75\nhttps://git.kernel.org/stable/c/cc20226e218a2375d50dd9ac14fb4121b43375ff\nhttps://git.kernel.org/stable/c/e8b8de17e164c9f1b7777f1c6f99d05539000036\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.253\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.214\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.290\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.288\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.156\nhttps://lore.kernel.org/linux-cve-announce/2024062001-CVE-2021-4439-59ce@gregkh/\n\n\u0414\u043b\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0445 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432 Red Hat Inc.:\nhttps://access.redhat.com/security/cve/CVE-2021-4439\n\n\u041a\u043e\u043c\u043f\u0435\u043d\u0441\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u043c\u0435\u0440\u044b:\n- \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u043d\u0435\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0445 \u0443\u0447\u0435\u0442\u043d\u044b\u0445 \u0437\u0430\u043f\u0438\u0441\u0435\u0439, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0443\u0447\u0435\u0442\u043d\u044b\u0445 \u0437\u0430\u043f\u0438\u0441\u0435\u0439 \u043d\u0435\u0434\u043e\u0432\u0435\u0440\u0435\u043d\u043d\u044b\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439;\n- \u043f\u0440\u0438\u043d\u0443\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u0430\u044f \u0441\u043c\u0435\u043d\u0430 \u043f\u0430\u0440\u043e\u043b\u0435\u0439 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439;\n- \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u043a\u043e\u043c\u0430\u043d\u0434\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0435 \u0434\u043b\u044f \u043d\u0435\u0434\u043e\u0432\u0435\u0440\u0435\u043d\u043d\u044b\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439;\n- \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0430\u043d\u0442\u0438\u0432\u0438\u0440\u0443\u0441\u043d\u044b\u0445 \u0441\u0440\u0435\u0434\u0441\u0442\u0432 \u0437\u0430\u0449\u0438\u0442\u044b;\n- \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043d\u0433 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0439 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439.",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "08.10.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "05.12.2024",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "16.09.2024",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2024-07041",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2021-4439",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Red Hat Enterprise Linux, Linux",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Red Hat, Inc. Red Hat Enterprise Linux 8 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.0 \u0434\u043e 4.4.289 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.5 \u0434\u043e 4.9.287 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.10 \u0434\u043e 4.14.252 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.15 \u0434\u043e 4.19.213 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.20 \u0434\u043e 5.4.155 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.5 \u0434\u043e 5.10.75 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.11 \u0434\u043e 5.14.14 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 cmtp_add_connection \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 /isdn/capi/kcapi.c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 isdn \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u043f\u0440\u043e\u0432\u0435\u0440\u0435\u043d\u043d\u043e\u0435 \u0438\u043d\u0434\u0435\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043c\u0430\u0441\u0441\u0438\u0432\u0430 (CWE-129), \u0417\u0430\u043f\u0438\u0441\u044c \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u0430\u043c\u0438 \u0431\u0443\u0444\u0435\u0440\u0430 (CWE-787)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 cmtp_add_connection \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 /isdn/capi/kcapi.c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 isdn \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u0432\u044b\u0445\u043e\u0434\u0430 \u0438\u043d\u0434\u0435\u043a\u0441\u0430 \u043c\u0430\u0441\u0441\u0438\u0432\u0430 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0430. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://access.redhat.com/security/cve/CVE-2021-4439\nhttps://git.kernel.org/linus/1f3e2e97c003f80c4b087092b225c8787ff91e4d\nhttps://git.kernel.org/stable/c/1f3e2e97c003f80c4b087092b225c8787ff91e4d\nhttps://git.kernel.org/stable/c/24219a977bfe3d658687e45615c70998acdbac5a\nhttps://git.kernel.org/stable/c/285e9210b1fab96a11c0be3ed5cea9dd48b6ac54\nhttps://git.kernel.org/stable/c/7d91adc0ccb060ce564103315189466eb822cc6a\nhttps://git.kernel.org/stable/c/7f221ccbee4ec662e2292d490a43ce6c314c4594\nhttps://git.kernel.org/stable/c/9b6b2db77bc3121fe435f1d4b56e34de443bec75\nhttps://git.kernel.org/stable/c/cc20226e218a2375d50dd9ac14fb4121b43375ff\nhttps://git.kernel.org/stable/c/e8b8de17e164c9f1b7777f1c6f99d05539000036\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.253\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.214\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.290\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.288\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.156\nhttps://lore.kernel.org/linux-cve-announce/2024062001-CVE-2021-4439-59ce@gregkh/\nhttps://vuldb.com/?id.269245\nhttps://www.cve.org/CVERecord?id=CVE-2021-4439",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-129, CWE-787",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 6,8)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,8)\n\u041d\u0435\u0442 \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 4.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 0)"
}

CVE-2021-4439 (GCVE-0-2021-4439)

Vulnerability from cvelistv5 – Published: 2024-06-20 12:07 – Updated: 2026-05-11 13:43

Title

isdn: cpai: check ctr->cnr to avoid array index out of bound

Summary

In the Linux kernel, the following vulnerability has been resolved: isdn: cpai: check ctr->cnr to avoid array index out of bound The cmtp_add_connection() would add a cmtp session to a controller and run a kernel thread to process cmtp. __module_get(THIS_MODULE); session->task = kthread_run(cmtp_session, session, "kcmtpd_ctr_%d", session->num); During this process, the kernel thread would call detach_capi_ctr() to detach a register controller. if the controller was not attached yet, detach_capi_ctr() would trigger an array-index-out-bounds bug. [ 46.866069][ T6479] UBSAN: array-index-out-of-bounds in drivers/isdn/capi/kcapi.c:483:21 [ 46.867196][ T6479] index -1 is out of range for type 'capi_ctr *[32]' [ 46.867982][ T6479] CPU: 1 PID: 6479 Comm: kcmtpd_ctr_0 Not tainted 5.15.0-rc2+ #8 [ 46.869002][ T6479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 [ 46.870107][ T6479] Call Trace: [ 46.870473][ T6479] dump_stack_lvl+0x57/0x7d [ 46.870974][ T6479] ubsan_epilogue+0x5/0x40 [ 46.871458][ T6479] __ubsan_handle_out_of_bounds.cold+0x43/0x48 [ 46.872135][ T6479] detach_capi_ctr+0x64/0xc0 [ 46.872639][ T6479] cmtp_session+0x5c8/0x5d0 [ 46.873131][ T6479] ? __init_waitqueue_head+0x60/0x60 [ 46.873712][ T6479] ? cmtp_add_msgpart+0x120/0x120 [ 46.874256][ T6479] kthread+0x147/0x170 [ 46.874709][ T6479] ? set_kthread_struct+0x40/0x40 [ 46.875248][ T6479] ret_from_fork+0x1f/0x30 [ 46.875773][ T6479]

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-06-20 14:46 UTC

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/e8b8de17e164c9f1b…
https://git.kernel.org/stable/c/24219a977bfe3d658…
https://git.kernel.org/stable/c/9b6b2db77bc3121fe…
https://git.kernel.org/stable/c/7d91adc0ccb060ce5…
https://git.kernel.org/stable/c/285e9210b1fab96a1…
https://git.kernel.org/stable/c/7f221ccbee4ec662e…
https://git.kernel.org/stable/c/cc20226e218a2375d…
https://git.kernel.org/stable/c/1f3e2e97c003f80c4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e8b8de17e164c9f1b7777f1c6f99d05539000036 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 24219a977bfe3d658687e45615c70998acdbac5a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9b6b2db77bc3121fe435f1d4b56e34de443bec75 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7d91adc0ccb060ce564103315189466eb822cc6a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 285e9210b1fab96a11c0be3ed5cea9dd48b6ac54 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7f221ccbee4ec662e2292d490a43ce6c314c4594 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cc20226e218a2375d50dd9ac14fb4121b43375ff (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1f3e2e97c003f80c4b087092b225c8787ff91e4d (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 4.4.290 , ≤ 4.4.* (semver) Unaffected: 4.9.288 , ≤ 4.9.* (semver) Unaffected: 4.14.253 , ≤ 4.14.* (semver) Unaffected: 4.19.214 , ≤ 4.19.* (semver) Unaffected: 5.4.156 , ≤ 5.4.* (semver) Unaffected: 5.10.76 , ≤ 5.10.* (semver) Unaffected: 5.14.15 , ≤ 5.14.* (semver) Unaffected: 5.15 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-4439",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-20T14:46:11.140255Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2024-07041 (CVE-2021-4439)

CVE-2021-4439 (GCVE-0-2021-4439)

Tags

Sightings

Nomenclature

Related by attack behaviour