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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4282 linux security update 14 November 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Access Privileged Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-11135 CVE-2019-0154 Reference: ASB-2019.0322 ASB-2019.0321 ESB-2019.4273 ESB-2019.4269.2 ESB-2019.4266 ESB-2019.4261 ESB-2019.4255 Original Bulletin: https://security-tracker.debian.org/tracker/DLA-1989-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Package : linux Version : 3.16.76-1 CVE ID : CVE-2019-0154 CVE-2019-11135 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service, or information leak. CVE-2019-0154 Intel discovered that on their 8th and 9th generation GPUs, reading certain registers while the GPU is in a low-power state can cause a system hang. A local user permitted to use the GPU can use this for denial of service. This update mitigates the issue through changes to the i915 driver. The affected chips (gen8) are listed at <https://en.wikipedia.org/wiki/List_of_Intel_graphics_processing_units#Gen8>;. CVE-2019-11135 It was discovered that on Intel CPUs supporting transactional memory (TSX), a transaction that is going to be aborted may continue to execute speculatively, reading sensitive data from internal buffers and leaking it through dependent operations. Intel calls this "TSX Asynchronous Abort" (TAA). For CPUs affected by the previously published Microarchitectural Data Sampling (MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091), the existing mitigation also mitigates this issue. For processors that are vulnerable to TAA but not MDS, this update disables TSX by default. This mitigation requires updated CPU microcode. An updated intel-microcode package (only available in Debian non-free) will be provided via a future DLA. The updated CPU microcode may also be available as part of a system firmware ("BIOS") update. Further information on the mitigation can be found at <https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html> or in the linux-doc-3.16 package. Intel's explanation of the issue can be found at <https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort>;. For Debian 8 "Jessie", these problems have been fixed in version 3.16.76-1. This update also includes other fixes from upstream stable updates. We recommend that you upgrade your linux packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - -- Ben Hutchings - Debian developer, member of kernel, installer and LTS teams - --------------------------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. 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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 iQIVAwUBXczeumaOgq3Tt24GAQgImQ/8DVtk7Ug/ejJ+T0d5dYYbR1DmYgZW+qwG VtDswL0UeCh/CMVrLPUCXgWJMlCi5u0OuyeRMGFv/Y0X2BEeRtTLfhWuMzTYVMq9 ENTbZZQY+npKYkLhvMo3XE87+PPmI8CAV42WWaKG+WfywNJM5aGq7r35IIaxlE/7 h0R59QznDw9lXpfGXEUjAN1b0kPcf5PjeW3GCswIvtkOKrUKUwDk/M9YS2oD2oGH HqzRHYCfhkFa8WXT7TfrvKes7ubtGlUlJy0HuzJEwR8E+JE4po6BWywDp77iJZr9 9sFL7CxI2z24KpaI5ALRuV3ba7ZpN24OGXFtotm9hPGryv9bAiATNjU4O7ZRMpap 6ErcwPjapFQCRlZNdc8ir8knHkcD9BXy3VclGcdMraemiVQ07t/IkiiQP9G058JY RPe+u+ytWTPZiWaeu8Ikk9UrYlpe4ofU9ubs73OC3ytlb5eswAhgVYFIfN7OXWAW qo7CK/8vdoy5UwzXmLK9S0w8OO/IxXIJc8ZmxENCoZ5FXmGPfU02bqu4yUk3Jt6q QF+d+2rwqnbMuFaKT4IgtyqfHQckqB7ceQD6QvF+VdXSYP+ppJpQjFOUXnDcQ7qp GVtbHeRfkFDyLUKQ9O14uqaVPYDe6EWiM3np4CQ6gxfywEooieO1BQMUI11mBEKW TkAscx7ibUo= =ScX3 -----END PGP SIGNATURE-----