CVE-2021-4159
Linux Kernel eBPF Verifier Internal Memory Information Leak
Description
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
INFO
Published Date :
Aug. 24, 2022, 4:15 p.m.
Last Modified :
Nov. 21, 2024, 6:37 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
0.8
Public PoC/Exploit Available at Github
CVE-2021-4159 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-4159
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-4159.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2021-4159 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2036024 | Issue Tracking |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd | Mailing List Patch Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html | Mailing List Third Party Advisory |
| https://security-tracker.debian.org/tracker/CVE-2021-4159 | Third Party Advisory |
| https://access.redhat.com/security/cve/CVE-2021-4159 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2036024 | Issue Tracking |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd | Mailing List Patch Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html | Mailing List Third Party Advisory |
| https://security-tracker.debian.org/tracker/CVE-2021-4159 | 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).
Map Vulnerabilities into Different Layers of the Container Image
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4159 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4159 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://access.redhat.com/security/cve/CVE-2021-4159 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2036024 Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd Added Reference https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html Added Reference https://security-tracker.debian.org/tracker/CVE-2021-4159 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Oct. 06, 2022
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html Mailing List, Third Party Advisory -
CVE Modified by [email protected]
Oct. 02, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 29, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://access.redhat.com/security/cve/CVE-2021-4159 No Types Assigned https://access.redhat.com/security/cve/CVE-2021-4159 Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2036024 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2036024 Issue Tracking Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd Mailing List, Patch, Vendor Advisory Changed Reference Type https://security-tracker.debian.org/tracker/CVE-2021-4159 No Types Assigned https://security-tracker.debian.org/tracker/CVE-2021-4159 Third Party Advisory Added CWE NIST NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.7 Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4159 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-2021-4159
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