CVE-2021-47046
drm/amd/display: Fix off by one in hdmi_14_process_transaction()
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix off by one in hdmi_14_process_transaction() The hdcp_i2c_offsets[] array did not have an entry for HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one read overflow. I added an entry and copied the 0x0 value for the offset from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c. I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX entries. This doesn't change the code, but it's just a belt and suspenders approach to try future proof the code.
INFO
Published Date :
Feb. 28, 2024, 9:15 a.m.
Last Modified :
Dec. 9, 2024, 7:02 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 | HIGH | [email protected] |
Solution
- There is no known solution at this time.
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-2021-47046.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47046 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-2021-47046
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-2021-47046 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47046 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]
Dec. 09, 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-193 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.21 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.4 Changed Reference Type https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7 No Types Assigned https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7 Patch Changed Reference Type https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7 No Types Assigned https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7 Patch Changed Reference Type https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138 No Types Assigned https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138 Patch Changed Reference Type https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138 No Types Assigned https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138 Patch Changed Reference Type https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5 No Types Assigned https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5 Patch Changed Reference Type https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5 No Types Assigned https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5 Patch Changed Reference Type https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 No Types Assigned https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 Patch Changed Reference Type https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 No Types Assigned https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 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/080bd41d6478a64edf96704fddcda52b1fd5fed7 Added Reference https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138 Added Reference https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5 Added Reference https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 -
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
Feb. 28, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix off by one in hdmi_14_process_transaction() The hdcp_i2c_offsets[] array did not have an entry for HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one read overflow. I added an entry and copied the 0x0 value for the offset from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c. I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX entries. This doesn't change the code, but it's just a belt and suspenders approach to try future proof the code. Added Reference Linux https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 [No types assigned]