CVE-2021-47604
Linux Kernel VDuse Out-of-Bounds Read Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: vduse: check that offset is within bounds in get_config() This condition checks "len" but it does not check "offset" and that could result in an out of bounds read if "offset > dev->config_size". The problem is that since both variables are unsigned the "dev->config_size - offset" subtraction would result in a very high unsigned value. I think these checks might not be necessary because "len" and "offset" are supposed to already have been validated using the vhost_vdpa_config_validate() function. But I do not know the code perfectly, and I like to be safe.
INFO
Published Date :
June 19, 2024, 3:15 p.m.
Last Modified :
Aug. 27, 2024, 4:14 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.2
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-2021-47604.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442 | Patch |
| https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a | Patch |
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-2021-47604 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47604 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]
Aug. 27, 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:N/A:H Changed Reference Type https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442 No Types Assigned https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442 Patch Changed Reference Type https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a No Types Assigned https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a Patch Added CWE NIST CWE-125 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 5.15.11 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 19, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: vduse: check that offset is within bounds in get_config() This condition checks "len" but it does not check "offset" and that could result in an out of bounds read if "offset > dev->config_size". The problem is that since both variables are unsigned the "dev->config_size - offset" subtraction would result in a very high unsigned value. I think these checks might not be necessary because "len" and "offset" are supposed to already have been validated using the vhost_vdpa_config_validate() function. But I do not know the code perfectly, and I like to be safe. Added Reference kernel.org https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442 [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-2021-47604 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-2021-47604
weaknesses.