CVE-2021-47427
"IBM Linux Use After Free in iscsi"
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix iscsi_task use after free Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn") added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but then also changed the handling of the case where we detect an already completed task where we now end up doing a goto to the common put/cleanup code. This results in a iscsi_task use after free, because the common cleanup code will do a put on the iscsi_task. This reverts the goto and moves the iscsi_get_conn() to after we've checked if the iscsi_task is valid.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Dec. 31, 2024, 8:04 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47427.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-47427 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47427 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 31, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.14 up to (excluding) 5.14.12 *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c No Types Assigned https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c Patch Changed Reference Type https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c No Types Assigned https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c Patch Changed Reference Type https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6 No Types Assigned https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6 Patch Changed Reference Type https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6 No Types Assigned https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c Added Reference https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix iscsi_task use after free Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn") added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but then also changed the handling of the case where we detect an already completed task where we now end up doing a goto to the common put/cleanup code. This results in a iscsi_task use after free, because the common cleanup code will do a put on the iscsi_task. This reverts the goto and moves the iscsi_get_conn() to after we've checked if the iscsi_task is valid. Added Reference kernel.org https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47427 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47427
weaknesses.