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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4269.2 USN-4188-1: Linux kernel vulnerability 14 November 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-11135 Reference: ASB-2019.0330 ASB-2019.0322 ESB-2019.4247 ESB-2019.4246 Original Bulletin: https://usn.ubuntu.com/4188-1/ Revision History: November 14 2019: Adjusted the I/A November 14 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4188-1: Linux kernel vulnerability 13 November 2019 linux, linux-lts-trusty vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 12.04 ESM Summary The system could be made to expose sensitive information. Software Description o linux - Linux kernel o linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM Details Stephan van Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM linux-image-3.13.0-175-generic - 3.13.0-175.226~12.04.1 linux-image-3.13.0-175-generic-lpae - 3.13.0-175.226~12.04.1 linux-image-3.13.0-175-lowlatency - 3.13.0-175.226~12.04.1 linux-image-3.2.0-144-generic - 3.2.0-144.191 linux-image-3.2.0-144-generic-pae - 3.2.0-144.191 linux-image-3.2.0-144-virtual - 3.2.0-144.191 linux-image-generic - 3.2.0.144.159 linux-image-generic-lpae-lts-trusty - 3.13.0.175.163 linux-image-generic-lts-trusty - 3.13.0.175.163 linux-image-generic-pae - 3.2.0.144.159 linux-image-server - 3.2.0.144.159 linux-image-virtual - 3.2.0.144.159 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . Please note that mitigating the TSX (CVE-2019-11135) issue requires a corresponding Intel processor microcode update. 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-2019-11135 o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915 - --------------------------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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXczHmWaOgq3Tt24GAQjOgA//UxN117uiNPFEZkfWBjD3RkOnOrU3WO+M cZK2NpfeeOIh81yTZwTBqcfjiEe4AfXG5wsXie6YL5jhkJKyvuTac0K8cAuMCiow W+mJkcMEMaGssnbqxhzy6R4ZpvdCyrzNIXZVb6bM/C+Iy2vDhUkmreg6zovT5SPf 9doPA/K9S66Rq7qO7q8HE47fzUycCPrzmPabnYJr/sv8p1mUl2dU8IHc9XAEAcjX p9t56hlbSxIJWyy/+vFDz9w9LwKEIkVXSXxeWaEAfylGKf6eCyB2UldHgHnww6aF at7IsQkqt4kMHtNvnqlFJVo6Hy5+BHsR8jx2ZRU2S2kPyvTJhLXC/I18L1h47zF0 7+Vgr5f7yX+NZ0N5WYA2p46HQNovdjSUQZ12+Vq5WUvUz9HRlfpoqkqExxMLKlqd K8XrzOlcMgm5MyiSSbWQcP+aXM6NP4WDyFaEAVD9cW5DWTej8PX33xSTNDa3C1bE ppyKOq5vXKzs/vSpvB9md1yrDUhyCLcLWGDxMz4fyzkaWruc+AtBOpJifEHypcr4 SQ4ETnfLulDEu5RAx5JyeQgn2jUufe56kiDNowSzEFLUSNzDDSREU2VeFHUZxzlG jeNlHT4N0n7JsNS/xK/FNM0IPQVAkVS+t0QMdK46UzRQUb9AYiPxU9iN+84J4de2 oSnkM3bJjhc= =5oJj -----END PGP SIGNATURE-----