CVE-2021-31440
Linux Kernel eBPF Privilege Escalation Vulnerability
Description
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661.
INFO
Published Date :
May 21, 2021, 3:15 p.m.
Last Modified :
Aug. 11, 2023, 7:53 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.0
Public PoC/Exploit Available at Github
CVE-2021-31440 has a 12 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-2021-31440
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-2021-31440.
| URL | Resource |
|---|---|
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10bf4e83167cc68595b85fd73bb91e8f2c086e36 | Patch Vendor Advisory |
| https://security.netapp.com/advisory/ntap-20210706-0003/ | Third Party Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-21-503/ | Third Party Advisory VDB Entry |
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).
None
C Shell Python Assembly Ruby Makefile Meson
Auto Root / Privilege Escalation Exploit
autoroot privilege privilege-escalation root
Shell
一些cve复现环境
Shell C
Linux privilege escalation exploits collection.
C Shell Python Assembly Ruby Makefile Meson
⚙ DevSecOps Kubernetes Playground ("A Hacker's Guide to Kubernetes")
Dockerfile Shell Ruby Smarty Jinja HCL
book website
kubernetes security
some interesting exploit articles
Formal verification example for CVE-2020-8835
Makefile Coq C
eBPF学习
ebpf kernel kprobe tracepoint uprobe xdp
Linux Eelvation(持续更新)
cve-2021-3156 cve-2019-7304 cve-2019-13272 cve-2018-18955 cve-2018-1000001 cve-2018-17182 cve-2017-1000367 cve-2017-1000112 cve-2017-16995 cve-2017-16939 linux-kernel elevation cve-2021-4034 cve-2022-0847
C Shell Python Ruby Makefile HTML
Linux kernel CVE exploit analysis report and relative debug environment. You don't need to compile Linux kernel and configure your environment anymore.
C Shell Makefile Meson
Anything about kernel security. CTF kernel pwn, kernel exploit, kernel fuzz and kernel defense paper, kernel debugging technique, kernel CVE debug.
C Shell Makefile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-31440 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-31440 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 -
Reanalysis by [email protected]
Aug. 11, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.11.15:*:*:*:*:*:*:* OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.7 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 -
Modified Analysis by [email protected]
May. 13, 2022
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20210706-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20210706-0003/ Third Party Advisory Added CPE Configuration AND OR *cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 06, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210706-0003/ [No Types Assigned] -
Reanalysis by [email protected]
Jun. 01, 2021
Action Type Old Value New Value Removed CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Removed CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H -
Initial Analysis by [email protected]
May. 28, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10bf4e83167cc68595b85fd73bb91e8f2c086e36 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10bf4e83167cc68595b85fd73bb91e8f2c086e36 Patch, Vendor Advisory Changed Reference Type https://www.zerodayinitiative.com/advisories/ZDI-21-503/ No Types Assigned https://www.zerodayinitiative.com/advisories/ZDI-21-503/ Third Party Advisory, VDB Entry Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.11.15:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-31440 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-2021-31440
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.14125
percentile