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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.0360 PolicyKit vulnerability 27 January 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: PolicyKit Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-4034 Reference: ESB-2022.0352 Original Bulletin: https://ubuntu.com/security/notices/USN-5252-1 https://ubuntu.com/security/notices/USN-5252-2 Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5252-1: PolicyKit vulnerability 25 January 2022 policykit-1 could be made to run programs as an administrator. Releases o Ubuntu 21.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o policykit-1 - framework for managing administrative policies and privileges Details It was discovered that the PolicyKit pkexec tool incorrectly handled command-line arguments. A local attacker could use this issue to escalate privileges to an administrator. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.10 o policykit-1 - 0.105-31ubuntu0.1 Ubuntu 20.04 o policykit-1 - 0.105-26ubuntu1.2 Ubuntu 18.04 o policykit-1 - 0.105-20ubuntu0.18.04.6 After a standard system update you need to reboot your computer to make all the necessary changes. References o CVE-2021-4034 Related notices o USN-5252-2 : policykit-1-doc, gir1.2-polkit-1.0, libpolkit-backend-1-dev, libpolkit-gobject-1-dev, libpolkit-gobject-1-0, libpolkit-agent-1-0, libpolkit-agent-1-dev, libpolkit-backend-1-0, policykit-1 - -------------------------------------------------------------------------------- USN-5252-2: PolicyKit vulnerability 25 January 2022 policykit-1 could be made to run programs as an administrator. Releases o Ubuntu 16.04 ESM o Ubuntu 14.04 ESM Packages o policykit-1 - framework for managing administrative policies and privileges Details USN-5252-1 fixed a vulnerability in policykit-1. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: It was discovered that the PolicyKit pkexec tool incorrectly handled command-line arguments. A local attacker could use this issue to escalate privileges to an administrator. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 o policykit-1 - 0.105-14.1ubuntu0.5+esm1 Available with UA Infra or UA Desktop Ubuntu 14.04 o policykit-1 - 0.105-4ubuntu3.14.04.6+esm1 Available with UA Infra or UA Desktop After a standard system update you need to reboot your computer to make all the necessary changes. References o CVE-2021-4034 Related notices o USN-5252-1 : libpolkit-agent-1-0, gir1.2-polkit-1.0, libpolkit-backend-1-0, libpolkit-gobject-1-0, libpolkit-backend-1-dev, libpolkit-gobject-1-dev, policykit-1-doc, policykit-1, libpolkit-agent-1-dev - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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