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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2537 Kernel Live Patch Security Notice LSN-0031-1 11 October 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-14106 CVE-2017-11600 Reference: ESB-2017.2401 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Kernel Live Patch Security Notice LSN-0031-1 October 10, 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: net/xfrm/xfrm_policy.c in the Linux kernel through 4.12.3, when CONFIG_XFRM_MIGRATE is enabled, does not ensure that the dir value of xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which allows local users to cause a denial of service (out-of-bounds access) or possibly have unspecified other impact via an XFRM_MSG_MIGRATE xfrm Netlink message. (CVE-2017-11600) Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14106) Update instructions: The problem can be corrected by updating your livepatches to the following versions: | Kernel | Version | flavors | |-----------------+----------+--------------------------| | 4.4.0-21.37 | 31.1 | generic, lowlatency | | 4.4.0-22.39 | 31.1 | generic, lowlatency | | 4.4.0-22.40 | 31.1 | generic, lowlatency | | 4.4.0-24.43 | 31.1 | generic, lowlatency | | 4.4.0-28.47 | 31.1 | generic, lowlatency | | 4.4.0-31.50 | 31.1 | generic, lowlatency | | 4.4.0-34.53 | 31.1 | generic, lowlatency | | 4.4.0-36.55 | 31.1 | generic, lowlatency | | 4.4.0-38.57 | 31.1 | generic, lowlatency | | 4.4.0-42.62 | 31.1 | generic, lowlatency | | 4.4.0-43.63 | 31.1 | generic, lowlatency | | 4.4.0-45.66 | 31.1 | generic, lowlatency | | 4.4.0-47.68 | 31.1 | generic, lowlatency | | 4.4.0-51.72 | 31.1 | generic, lowlatency | | 4.4.0-53.74 | 31.1 | generic, lowlatency | | 4.4.0-57.78 | 31.1 | generic, lowlatency | | 4.4.0-59.80 | 31.1 | generic, lowlatency | | 4.4.0-62.83 | 31.1 | generic, lowlatency | | 4.4.0-63.84 | 31.1 | generic, lowlatency | | 4.4.0-64.85 | 31.1 | generic, lowlatency | | 4.4.0-66.87 | 31.1 | generic, lowlatency | | 4.4.0-67.88 | 31.1 | generic, lowlatency | | 4.4.0-70.91 | 31.1 | generic, lowlatency | | 4.4.0-71.92 | 31.1 | generic, lowlatency | | 4.4.0-72.93 | 31.1 | generic, lowlatency | | 4.4.0-75.96 | 31.1 | generic, lowlatency | | 4.4.0-77.98 | 31.1 | generic, lowlatency | | 4.4.0-78.99 | 31.1 | generic, lowlatency | | 4.4.0-79.100 | 31.1 | generic, lowlatency | | 4.4.0-81.104 | 31.1 | generic, lowlatency | | 4.4.0-83.106 | 31.1 | generic, lowlatency | | 4.4.0-87.110 | 31.1 | generic, lowlatency | | 4.4.0-89.112 | 31.1 | generic, lowlatency | | 4.4.0-91.114 | 31.1 | generic, lowlatency | | 4.4.0-92.115 | 31.1 | generic, lowlatency | | 4.4.0-93.116 | 31.1 | generic, lowlatency | | 4.4.0-96.119 | 31.1 | 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 | | lts-4.4.0-96.119_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-2017-11600, CVE-2017-14106 - -- - --------------------------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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