Summary
CVE-2021-4034 is a Local Privilege Escalation (LPE) vulnerability, located in the "Polkit" package
installed by default on almost every major distribution of the Linux operating system.
On 2022-01-25, Qualys released an advisory for this LPE vulnerability, advising to either update the “Polkit” package or implement the mitigation that Qualys recommends.
In an air-gapped system SICK recommends all customers to implement at least the available mitigation for the corresponding Linux distribution. Please note, that this vulnerability can be exploited only if an user with unprivileged authorization can establish a connection to the systems.
Vulnerabilities 1
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High 7.8
A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid too…
KEV Jun 27, 2022
Revision history
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#3
Updated Advisory: URL for SICK Operating Guidelines has been updated
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#2
Updated Advisory (only visual changes)
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#1
Initial release
References
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SICK PSIRT Security Advisories
https://sick.com/psirt
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SICK Operating Guidelines
https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
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ICS-CERT recommended practices on Industrial Security
http://ics-cert.us-cert.gov/content/recommended-practices
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CVSS v3.1 Calculator
https://www.first.org/cvss/calculator/3.1