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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.3080 USN-6122-1: Linux kernel (OEM) vulnerabilities 31 May 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Linux kernel (OEM) Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2023-32233 CVE-2023-2612 Original Bulletin: https://ubuntu.com/security/notices/USN-6122-1 Comment: CVSS (Max): 7.8* CVE-2023-32233 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: NVD Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * Not all CVSS available when published - --------------------------BEGIN INCLUDED TEXT-------------------- USN-6122-1: Linux kernel (OEM) vulnerabilities 30 May 2023 Several security issues were fixed in the Linux kernel. Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Learn more about Ubuntu Pro Releases o Ubuntu 22.04 LTS Packages o linux-oem-6.1 - Linux kernel for OEM systems Details Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in the netfilter subsystem of the Linux kernel when processing batch requests, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ( CVE-2023-32233 ) Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock). ( CVE-2023-2612 ) Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Learn more about Ubuntu Pro Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 o linux-image-6.1.0-1013-oem - 6.1.0-1013.13 o linux-image-oem-22.04c - 6.1.0.1013.13 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References o CVE-2023-32233 o CVE-2023-2612 Related notices o USN-6123-1 : linux-oem-6.0-tools-6.0.0-1017, linux-tools-oem-22.04b, linux-image-oem-22.04b, linux-modules-ivsc-oem-22.04b, linux-modules-iwlwifi-6.0.0-1017-oem, linux-tools-6.0.0-1017-oem, linux-modules-iwlwifi-oem-22.04b, linux-oem-6.0, linux-oem-22.04b, linux-image-unsigned-6.0.0-1017-oem, linux-buildinfo-6.0.0-1017-oem, linux-headers-6.0.0-1017-oem, linux-modules-ivsc-6.0.0-1017-oem, linux-oem-6.0-headers-6.0.0-1017, linux-headers-oem-22.04b, linux-modules-6.0.0-1017-oem, linux-modules-ipu6-6.0.0-1017-oem, linux-modules-ipu6-oem-22.04b, linux-image-6.0.0-1017-oem, linux-oem-6.0-tools-host o USN-6124-1 : linux-modules-iwlwifi-oem-22.04a, linux-headers-oem-22.04a, linux-modules-ipu6-oem-22.04, linux-image-oem-22.04, linux-modules-5.17.0-1032-oem, linux-tools-5.17.0-1032-oem, linux-image-5.17.0-1032-oem, linux-modules-iwlwifi-oem-22.04, linux-oem-22.04, linux-oem-5.17-headers-5.17.0-1032, linux-oem-5.17-tools-5.17.0-1032, linux-buildinfo-5.17.0-1032-oem, linux-modules-ivsc-oem-22.04, linux-headers-oem-22.04, linux-modules-ivsc-oem-22.04a, linux-headers-5.17.0-1032-oem, linux-modules-ivsc-5.17.0-1032-oem, linux-tools-oem-22.04a, linux-image-unsigned-5.17.0-1032-oem, linux-image-oem-22.04a, linux-tools-oem-22.04, linux-modules-ipu6-oem-22.04a, linux-oem-5.17-tools-host, linux-oem-22.04a, linux-modules-ipu6-5.17.0-1032-oem, linux-modules-iwlwifi-5.17.0-1032-oem, linux-oem-5.17 - --------------------------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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