CVE - CVE-2021-4034

CVE-ID
CVE-2021-4034	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/ MISC:http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html URL:http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html MISC:http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html URL:http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html MISC:https://access.redhat.com/security/vulnerabilities/RHSB-2022-001 URL:https://access.redhat.com/security/vulnerabilities/RHSB-2022-001 MISC:https://bugzilla.redhat.com/show_bug.cgi?id=2025869 URL:https://bugzilla.redhat.com/show_bug.cgi?id=2025869 MISC:https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf URL:https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf MISC:https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 URL:https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 MISC:https://www.oracle.com/security-alerts/cpuapr2022.html URL:https://www.oracle.com/security-alerts/cpuapr2022.html MISC:https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt URL:https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt MISC:https://www.starwindsoftware.com/security/sw-20220818-0001/ URL:https://www.starwindsoftware.com/security/sw-20220818-0001/ MISC:https://www.suse.com/support/kb/doc/?id=000020564 URL:https://www.suse.com/support/kb/doc/?id=000020564
Assigning CNA
Red Hat, Inc.
Date Record Created
20211129	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20211129)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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