7.0
HIGH
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 :

Nov. 21, 2024, 6:05 a.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.

ID Vendor Product Action
1 Netapp solidfire_baseboard_management_controller_firmware
2 Netapp cloud_backup
3 Netapp h300s_firmware
4 Netapp h500s_firmware
5 Netapp h700s_firmware
6 Netapp h410s_firmware
7 Netapp solidfire_baseboard_management_controller
8 Netapp h300s
9 Netapp h410s
10 Netapp h500s
11 Netapp h700s
12 Netapp h300e_firmware
13 Netapp h500e_firmware
14 Netapp h700e_firmware
15 Netapp h300e
16 Netapp h500e
17 Netapp h700e
1 Linux linux_kernel
: Total Affected Vendor : 2 | Products : 18
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
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).

Profile Photo
a-roshbaik/Linux-Privilege-Escalation-Exploits

None

C Shell Python Assembly Ruby Makefile Meson

Updated: 5 months ago
0 stars 0 fork 0 watcher
Born at : July 20, 2024, 8:34 p.m. This repo has been linked 91 different CVEs too.
Profile Photo
HaxorSecInfec/autoroot.sh

Auto Root / Privilege Escalation Exploit

autoroot privilege privilege-escalation root

Shell

Updated: 4 months ago
2 stars 1 fork 1 watcher
Born at : June 11, 2024, 9:57 p.m. This repo has been linked 85 different CVEs too.
Profile Photo
XiaozaYa/CVE-Recording

一些cve复现环境

Shell C

Updated: 7 months ago
0 stars 1 fork 1 watcher
Born at : Oct. 20, 2023, 9:01 a.m. This repo has been linked 10 different CVEs too.
Profile Photo
JlSakuya/Linux-Privilege-Escalation-Exploits

Linux privilege escalation exploits collection.

C Shell Python Assembly Ruby Makefile Meson

Updated: 3 weeks, 3 days ago
108 stars 15 fork 15 watcher
Born at : April 26, 2023, 2:58 p.m. This repo has been linked 91 different CVEs too.
Profile Photo
adavarski/HomeLab-k8s-DevSecOps-playground

⚙ DevSecOps Kubernetes Playground ("A Hacker's Guide to Kubernetes")

Dockerfile Shell Ruby Smarty Jinja HCL

Updated: 2 weeks, 4 days ago
16 stars 2 fork 2 watcher
Born at : July 1, 2022, 7:12 a.m. This repo has been linked 57 different CVEs too.
Profile Photo
hacking-kubernetes/hacking-kubernetes.info

book website

kubernetes security

Updated: 3 months ago
66 stars 6 fork 6 watcher
Born at : Aug. 15, 2021, 6:15 p.m. This repo has been linked 21 different CVEs too.
Profile Photo
ChoKyuWon/exploit_articles

some interesting exploit articles

Updated: 2 years, 9 months ago
2 stars 0 fork 0 watcher
Born at : July 29, 2021, 6:10 p.m. This repo has been linked 3 different CVEs too.
Profile Photo
digamma-ai/CVE-2020-8835-verification

Formal verification example for CVE-2020-8835

Makefile Coq C

Updated: 2 years, 10 months ago
2 stars 0 fork 0 watcher
Born at : June 4, 2021, 4:15 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
yifengyou/ebpf

eBPF学习

ebpf kernel kprobe tracepoint uprobe xdp

Updated: 3 weeks, 1 day ago
16 stars 4 fork 4 watcher
Born at : May 1, 2021, 10:38 a.m. This repo has been linked 2 different CVEs too.
Profile Photo
Al1ex/LinuxEelvation

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

Updated: 1 month ago
393 stars 92 fork 92 watcher
Born at : March 30, 2021, 7:09 a.m. This repo has been linked 72 different CVEs too.
Profile Photo
bsauce/kernel-exploit-factory

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

Updated: 2 weeks, 2 days ago
1181 stars 184 fork 184 watcher
Born at : Dec. 11, 2020, 1:28 p.m. This repo has been linked 38 different CVEs too.
Profile Photo
bsauce/kernel-security-learning

Anything about kernel security. CTF kernel pwn, kernel exploit, kernel fuzz and kernel defense paper, kernel debugging technique, kernel CVE debug.

C Shell Makefile

Updated: 2 weeks, 2 days ago
643 stars 78 fork 78 watcher
Born at : Nov. 27, 2019, 7:50 a.m. This repo has been linked 37 different CVEs too.

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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10bf4e83167cc68595b85fd73bb91e8f2c086e36
    Added Reference https://security.netapp.com/advisory/ntap-20210706-0003/
    Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-503/
  • 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:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
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

0.19390

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: