CVE-2021-47095
Linux Kernel ipmi:ssifBuffer Overflow
Description
In the Linux kernel, the following vulnerability has been resolved: ipmi: ssif: initialize ssif_info->client early During probe ssif_info->client is dereferenced in error path. However, it is set when some of the error checking has already been done. This causes following kernel crash if an error path is taken: [ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present [ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088 ... [ 30.657723][ T674] pc : __dev_printk+0x28/0xa0 [ 30.657732][ T674] lr : _dev_err+0x7c/0xa0 ... [ 30.657772][ T674] Call trace: [ 30.657775][ T674] __dev_printk+0x28/0xa0 [ 30.657778][ T674] _dev_err+0x7c/0xa0 [ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e] [ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0 ... Initialize ssif_info->client before any error path can be taken. Clear i2c_client data in the error path to prevent the dangling pointer from leaking.
INFO
Published Date :
March 4, 2024, 6:15 p.m.
Last Modified :
Jan. 7, 2025, 8:15 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the affected Linux packages.
- Reboot the system after the update.
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-2021-47095.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47095 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-2021-47095
weaknesses.
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47095 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47095 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.
-
Initial Analysis by [email protected]
Jan. 07, 2025
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4 up to (excluding) 5.4.169 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.89 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.12 *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c No Types Assigned https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c Patch Changed Reference Type https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c No Types Assigned https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c Patch Changed Reference Type https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 No Types Assigned https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 Patch Changed Reference Type https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 No Types Assigned https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 Patch Changed Reference Type https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 No Types Assigned https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 Patch Changed Reference Type https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 No Types Assigned https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 Patch Changed Reference Type https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af No Types Assigned https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af Patch Changed Reference Type https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af No Types Assigned https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af 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/1f6ab847461ce7dd89ae9db2dd4658c993355d7c Added Reference https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 Added Reference https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 Added Reference https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 04, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: ipmi: ssif: initialize ssif_info->client early During probe ssif_info->client is dereferenced in error path. However, it is set when some of the error checking has already been done. This causes following kernel crash if an error path is taken: [ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present [ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088 ... [ 30.657723][ T674] pc : __dev_printk+0x28/0xa0 [ 30.657732][ T674] lr : _dev_err+0x7c/0xa0 ... [ 30.657772][ T674] Call trace: [ 30.657775][ T674] __dev_printk+0x28/0xa0 [ 30.657778][ T674] _dev_err+0x7c/0xa0 [ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e] [ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0 ... Initialize ssif_info->client before any error path can be taken. Clear i2c_client data in the error path to prevent the dangling pointer from leaking. Added Reference Linux https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 [No types assigned]