CVE-2021-4001
Linux Ebpf Verifier Race Condition Vulnerability
Description
A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel versions prior to 5.16 rc2.
INFO
Published Date :
Jan. 21, 2022, 7:15 p.m.
Last Modified :
Nov. 16, 2022, 3:36 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
0.5
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-2021-4001.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2025645 | Issue Tracking Patch Third Party Advisory |
| https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=353050be4c19e102178ccc05988101887c25ae53 | Patch Third Party Advisory |
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-2021-4001 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4001 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.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Nov. 16, 2022
Action Type Old Value New Value -
CVE Modified by [email protected]
Oct. 07, 2022
Action Type Old Value New Value Removed CWE Red Hat, Inc. CWE-362 Added CWE Red Hat, Inc. CWE-367 Removed CWE Reason CWE-362 / More CWEs associated -
Reanalysis by [email protected]
Aug. 05, 2022
Action Type Old Value New Value -
Reanalysis by [email protected]
Jan. 28, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.15 *cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16.0:rc1:*:*:*:*:*:* OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.15 *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* -
Initial Analysis by [email protected]
Jan. 28, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:N/I:C/A:N) Added CVSS V3.1 NIST AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2025645 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2025645 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=353050be4c19e102178ccc05988101887c25ae53 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=353050be4c19e102178ccc05988101887c25ae53 Patch, Third Party Advisory Added CWE NIST CWE-367 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.15 *cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16.0:rc1:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4001 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-2021-4001
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile