CVE-2021-47328

scsi: iscsi: Fix conn use after free during resets

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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

scsi: iscsi: Fix conn use after free during resets

If we haven't done a unbind target call we can race where
iscsi_conn_teardown wakes up the EH thread and then frees the conn while
those threads are still accessing the conn ehwait.

We can only do one TMF per session so this just moves the TMF fields from
the conn to the session. We can then rely on the
iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call
to remove the target and it's devices, and know after that point there is
no device or scsi-ml callout trying to access the session.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: iscsi: corrige el uso de la conexión después de liberarla durante los reinicios. Si no hemos realizado una llamada de destino de desvinculación, podemos correr donde iscsi_conn_teardown activa el subproceso EH y luego libera la conexión mientras esos Los hilos todavía están accediendo a la conexión ehwait. Solo podemos hacer un TMF por sesión, por lo que esto simplemente mueve los campos TMF de la conexión a la sesión. Luego podemos confiar en la llamada iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session para eliminar el objetivo y sus dispositivos, y saber después de ese punto que no hay ningún dispositivo o llamada scsi-ml intentando acceder a la sesión.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-21 CVE Reserved
2024-05-21 CVE Published
2024-05-22 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (6)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/bf20d85a88384574fabb3d53ad62a8af57e7ab11	2021-07-20
https://git.kernel.org/stable/c/d04958a348e560938410e04a12fb99da9c7e6a00	2021-07-20
https://git.kernel.org/stable/c/89812e7957ab0746eab66ed6fc49d52bb4dca250	2021-07-20
https://git.kernel.org/stable/c/f0a031f7c55ffd944fead1ddaf2aa94df9a158c1	2021-07-20
https://git.kernel.org/stable/c/fa9542b35ceb4202e8f8d65f440529a63524dca9	2021-07-20
https://git.kernel.org/stable/c/ec29d0ac29be366450a7faffbcf8cba3a6a3b506	2021-06-02

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.19.198 Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.198"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.4.134 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.134"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.52 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.52"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.12.19 Search vendor "Linux" for product "Linux Kernel" and version " < 5.12.19"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.13.4 Search vendor "Linux" for product "Linux Kernel" and version " < 5.13.4"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.14 Search vendor "Linux" for product "Linux Kernel" and version " < 5.14"		en		Affected