CVE-2021-4034
Red Hat Polkit Out-of-Bounds Read and Write Vulner - [Actively Exploited]
Description
A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.
INFO
Published Date :
Jan. 28, 2022, 8:15 p.m.
Last Modified :
Nov. 5, 2024, 7:38 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability that allows for privilege escalation with administrative rights.
Apply updates per vendor instructions.
Public PoC/Exploit Available at Github
CVE-2021-4034 has a 404 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-2021-4034
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-2021-4034.
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
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Makefile C Shell
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C
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My Final report of GSoC 2024 ❤️
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滲透筆記
My stars. View raw for full list.
None
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4034 vulnerability anywhere in the article.
-
AttackIQ
Response to CISA Advisory (AA24-317A): 2023 Top Routinely Exploited Vulnerabilities
On November 12, 2024, the U.S. Cybersecurity & Infrastructure Security Agency (CISA) released a Cybersecurity Advisory (CSA) providing details on the Common Vulnerabilities and Exposures (CVEs) routin ... Read more
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security.nl
VS publiceert overzicht van meest misbruikte kwetsbaarheden in 2023
De Amerikaanse autoriteiten hebben samen met cyberagentschappen uit Australië, Canada, Nieuw-Zeeland en het Verenigd Koninkrijk een overzicht van de meest misbruikte kwetsbaarheden in 2023 opgesteld. ... Read more
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Help Net Security
Linux systems targeted with stealthy “Perfctl” cryptomining malware
Thousands of Linux systems are likely infected with the highly elusive and persistent “perfctl” (or “perfcc“) cryptomining malware and many others still could be at risk of getting compromised, Aqua S ... Read more
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BleepingComputer
Linux malware “perfctl” behind years-long cryptomining campaign
A Linux malware named "perfctl" has been targeting Linux servers and workstations for at least three years, remaining largely undetected through high levels of evasion and the use of rootkits. Accordi ... Read more
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Kaspersky
Exploits and vulnerabilities in Q2 2024
Q2 2024 was eventful in terms of new interesting vulnerabilities and exploitation techniques for applications and operating systems. Attacks through vulnerable drivers have become prevalent as a gener ... Read more
The following table lists the changes that have been made to the
CVE-2021-4034 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.
-
Modified Analysis by [email protected]
Nov. 05, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:starwindsoftware:command_center:1.0:update3_build5871:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_hyperconverged_appliance:-:*:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14338:*:*:*:*:*:* OR *cpe:2.3:a:starwindsoftware:command_center:1.0:update3_build5871:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14338:*:*:*:*:*:* -
Modified Analysis by [email protected]
Nov. 05, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:starwindsoftware:command_center:1.0:update3_build5871:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_hyperconverged_appliance:-:*:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14338:*:*:*:*:*:* OR *cpe:2.3:a:starwindsoftware:command_center:1.0:update3_build5871:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14338:*:*:*:*:*:* -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 04, 2024
Action Type Old Value New Value Added CVSS V3.1 CISA-ADP AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
Modified Analysis by [email protected]
Jun. 28, 2024
Action Type Old Value New Value Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2025869 Issue Tracking, Patch, Vendor Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2025869 Issue Tracking, Patch Changed Reference Type https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 Patch, Third Party Advisory https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 Patch Changed Reference Type https://www.oracle.com/security-alerts/cpuapr2022.html Third Party Advisory https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory Changed Reference Type https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/ No Types Assigned https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/ Exploit, Third Party Advisory -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CWE Red Hat, Inc. CWE-125 -
CVE Modified by [email protected]
Oct. 18, 2023
Action Type Old Value New Value Added Reference https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/ [No Types Assigned] -
Modified Analysis by [email protected]
Sep. 11, 2023
Action Type Old Value New Value Added CWE NIST CWE-125 Changed CPE Configuration OR *cpe:2.3:a:polkit_project:polkit:*:*:*:*:*:*:*:* OR *cpe:2.3:a:polkit_project:polkit:*:*:*:*:*:*:*:* versions up to (excluding) 121 -
CVE Modified by [email protected]
Feb. 13, 2023
Action Type Old Value New Value Changed Description CVE-2021-4034 polkit: Local privilege escalation in pkexec due to incorrect handling of argument vector A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine. Removed CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Removed Reference https://access.redhat.com/errata/RHSA-2022:0265 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0266 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0267 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0268 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0269 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0270 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0271 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0272 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0273 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0274 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0443 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0540 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2021-4034 [No Types Assigned] Added CWE Red Hat, Inc. CWE-125 Added CWE Red Hat, Inc. CWE-787 -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Description A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine. CVE-2021-4034 polkit: Local privilege escalation in pkexec due to incorrect handling of argument vector Added CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added Reference https://access.redhat.com/errata/RHSA-2022:0268 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0269 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0266 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0267 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0443 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0265 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0540 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0273 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0274 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0271 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0272 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0270 [No Types Assigned] Added Reference https://access.redhat.com/security/cve/CVE-2021-4034 [No Types Assigned] Removed CWE Red Hat, Inc. CWE-125 Removed CWE Red Hat, Inc. CWE-787 Removed CWE Reason CWE-125 / More specific CWE option available -
Modified Analysis by [email protected]
Oct. 25, 2022
Action Type Old Value New Value Changed Reference Type https://www.starwindsoftware.com/security/sw-20220818-0001/ No Types Assigned https://www.starwindsoftware.com/security/sw-20220818-0001/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:starwindsoftware:command_center:1.0:update3_build5871:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_hyperconverged_appliance:-:*:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14338:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 11, 2022
Action Type Old Value New Value Added Reference https://www.starwindsoftware.com/security/sw-20220818-0001/ [No Types Assigned] -
Modified Analysis by [email protected]
Oct. 05, 2022
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html Third Party Advisory http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html Third Party Advisory, VDB Entry Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpuapr2022.html No Types Assigned https://www.oracle.com/security-alerts/cpuapr2022.html Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:siemens:sinumerik_edge:*:*:*:*:*:*:*:* versions up to (excluding) 3.3.0 Added CPE Configuration AND OR *cpe:2.3:o:siemens:scalance_lpe9403_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.0 OR cpe:2.3:h:siemens:scalance_lpe9403:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 14, 2022
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf [No Types Assigned] -
CVE Modified by [email protected]
Apr. 20, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuapr2022.html [No Types Assigned] -
Modified Analysis by [email protected]
Apr. 18, 2022
Action Type Old Value New Value Removed Evaluator Description Please note that the fix for polkit has been committed to master, but an official release has not been supplied by the maintainers at the time of analysis. This limits the ability of our staff to represent this product through CPE. We advise all users reach out to the organizations responsible for maintaining their package repository to ensure the appropriate version and/or patch of your packages are installed. Changed Reference Type http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html No Types Assigned http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry Changed Reference Type http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html No Types Assigned http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html Third Party Advisory Changed Reference Type https://www.suse.com/support/kb/doc/?id=000020564 No Types Assigned https://www.suse.com/support/kb/doc/?id=000020564 Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:suse:enterprise_storage:7.0:*:*:*:*:*:*:* *cpe:2.3:a:suse:linux_enterprise_high_performance_computing:15.0:sp2:*:*:-:*:*:* *cpe:2.3:a:suse:manager_proxy:4.1:*:*:*:*:*:*:* *cpe:2.3:a:suse:manager_server:4.1:*:*:*:*:*:*:* *cpe:2.3:o:suse:linux_enterprise_desktop:15:sp2:*:*:*:*:*:* *cpe:2.3:o:suse:linux_enterprise_server:15:sp2:*:*:*:-:*:* *cpe:2.3:o:suse:linux_enterprise_server:15:sp2:*:*:*:sap:*:* *cpe:2.3:o:suse:linux_enterprise_workstation_extension:12:sp5:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 14, 2022
Action Type Old Value New Value Added Reference https://www.suse.com/support/kb/doc/?id=000020564 [No Types Assigned] -
CVE Modified by [email protected]
Mar. 04, 2022
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html [No Types Assigned] -
CVE Modified by [email protected]
Mar. 03, 2022
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html [No Types Assigned] Added CWE Red Hat, Inc. CWE-125 Added CWE Red Hat, Inc. CWE-787 -
Initial Analysis by [email protected]
Jan. 31, 2022
Action Type Old Value New Value Added Evaluator Description Please note that the fix for polkit has been committed to master, but an official release has not been supplied by the maintainers at the time of analysis. This limits the ability of our staff to represent this product through CPE. We advise all users reach out to the organizations responsible for maintaining their package repository to ensure the appropriate version and/or patch of your packages are installed. 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:U/C:H/I:H/A:H Changed Reference Type https://access.redhat.com/security/vulnerabilities/RHSB-2022-001 No Types Assigned https://access.redhat.com/security/vulnerabilities/RHSB-2022-001 Mitigation, Vendor Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2025869 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2025869 Issue Tracking, Patch, Vendor Advisory Changed Reference Type https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 No Types Assigned https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 Patch, Third Party Advisory Changed Reference Type https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt No Types Assigned https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt Exploit, Mitigation, Third Party Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:polkit_project:polkit:*:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:redhat:enterprise_linux_server_update_services_for_sap_solutions:7.6:*:*:*:*:*:*:* *cpe:2.3:a:redhat:enterprise_linux_server_update_services_for_sap_solutions:7.7:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.1:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_eus:8.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 28, 2022
Action Type Old Value New Value Removed CWE Red Hat, Inc. CWE-125 Removed CWE Red Hat, Inc. CWE-787
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4034 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-2021-4034
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.13 }} 0.01%
score
0.49759
percentile