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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2375 LSN-0030-1 Linux kernel vulnerability 20 September 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Linux kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Root Compromise -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-1000379 CVE-2017-1000251 CVE-2017-10663 Reference: ESB-2017.2364 ESB-2017.2298 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== September 18, 2017 linux vulnerability ========================================================================== A security issue affects these releases of Ubuntu: | Series | Base kernel | Arch | flavors | |------------------+--------------+----------+------------------| | Ubuntu 16.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 16.04 LTS | 4.4.0 | amd64 | lowlatency | | Ubuntu 14.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 14.04 LTS | 4.4.0 | amd64 | lowlatency | Summary: Several security issues were fixed in the kernel. Software Description: - - linux: Linux kernel Details: The Linux Kernel running on AMD64 systems will sometimes map the contents of PIE executable, the heap or ld.so to where the stack is mapped allowing attackers to more easily manipulate the stack. (CVE-2017-1000379) It was discovered that a buffer overflow existed in the Bluetooth stack of the Linux kernel when handling L2CAP cpnfiguration responses. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-1000251) It was discovered that the Flash-Friendly File System (f2fs) implementation in the Linux kernel did not properly validate superblock metadata. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-10663) Update instructions: The problem can be corrected by updating your livepatches to the following versions: | Kernel | Version | flavors | |-----------------+----------+--------------------------| | 4.4.0-21.37 | 30.3 | generic, lowlatency | | 4.4.0-22.39 | 30.3 | generic, lowlatency | | 4.4.0-22.40 | 30.3 | generic, lowlatency | | 4.4.0-24.43 | 30.3 | generic, lowlatency | | 4.4.0-28.47 | 30.3 | generic, lowlatency | | 4.4.0-31.50 | 30.3 | generic, lowlatency | | 4.4.0-34.53 | 30.3 | generic, lowlatency | | 4.4.0-36.55 | 30.3 | generic, lowlatency | | 4.4.0-38.57 | 30.3 | generic, lowlatency | | 4.4.0-42.62 | 30.3 | generic, lowlatency | | 4.4.0-43.63 | 30.3 | generic, lowlatency | | 4.4.0-45.66 | 30.3 | generic, lowlatency | | 4.4.0-47.68 | 30.3 | generic, lowlatency | | 4.4.0-51.72 | 30.3 | generic, lowlatency | | 4.4.0-53.74 | 30.3 | generic, lowlatency | | 4.4.0-57.78 | 30.3 | generic, lowlatency | | 4.4.0-59.80 | 30.3 | generic, lowlatency | | 4.4.0-62.83 | 30.3 | generic, lowlatency | | 4.4.0-63.84 | 30.3 | generic, lowlatency | | 4.4.0-64.85 | 30.3 | generic, lowlatency | | 4.4.0-66.87 | 30.3 | generic, lowlatency | | 4.4.0-67.88 | 30.3 | generic, lowlatency | | 4.4.0-70.91 | 30.3 | generic, lowlatency | | 4.4.0-71.92 | 30.3 | generic, lowlatency | | 4.4.0-72.93 | 30.3 | generic, lowlatency | | 4.4.0-75.96 | 30.3 | generic, lowlatency | | 4.4.0-77.98 | 30.3 | generic, lowlatency | | 4.4.0-78.99 | 30.3 | generic, lowlatency | | 4.4.0-79.100 | 30.3 | generic, lowlatency | | 4.4.0-81.104 | 30.3 | generic, lowlatency | | 4.4.0-83.106 | 30.3 | generic, lowlatency | | 4.4.0-87.110 | 30.3 | generic, lowlatency | | 4.4.0-89.112 | 30.3 | generic, lowlatency | | 4.4.0-91.114 | 30.3 | generic, lowlatency | | 4.4.0-92.115 | 30.3 | generic, lowlatency | | 4.4.0-93.116 | 30.3 | generic, lowlatency | | lts-4.4.0-21.37_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-22.39_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-22.40_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-24.43_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-28.47_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-31.50_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-34.53_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-36.55_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-38.57_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-42.62_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-45.66_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-47.68_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-51.72_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-53.74_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-57.78_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-59.80_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-62.83_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-63.84_14.04.2-lts-xenial | 14.04.2 | generic, lowlatency | | lts-4.4.0-64.85_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-66.87_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-70.91_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-71.92_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-72.93_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-75.96_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-78.99_14.04.2-lts-xenial | 14.04.2 | generic, lowlatency | | lts-4.4.0-79.100_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-81.104_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-87.110_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-89.112_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-91.114_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-92.115_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | Additionally, you should install an updated kernel with these fixes and reboot at your convienience. References: CVE-2017-1000251, CVE-2017-1000379, CVE-2017-10663 - -- - --------------------------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. 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