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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1397 Linux kernel updated in Ubuntu 16.04 LTS and 14.04 LTS for amd64 8 May 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Root Compromise -- Existing Account Denial of Service -- Existing Account Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-1000199 CVE-2018-8043 CVE-2018-5344 CVE-2018-5333 CVE-2017-17450 CVE-2017-17448 CVE-2017-16995 CVE-2017-15129 CVE-2017-0861 Reference: ESB-2018.1359 ESB-2018.1262 ESB-2018.1046 ESB-2018.0558 Original Bulletin: https://lists.ubuntu.com/archives/ubuntu-security-announce/2018-May/004380.html - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Kernel Live Patch Security Notice LSN-0037-1 May 02, 2018 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: Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16995) It was discovered that a race condition leading to a use-after-free vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-0861) It was discovered that a use-after-free vulnerability existed in the network namespaces implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15129) It was discovered that the netfilter component of the Linux did not properly restrict access to the connection tracking helpers list. A local attacker could use this to bypass intended access restrictions. (CVE-2017-17448) It was discovered that the netfilter passive OS fingerprinting (xt_osf) module did not properly perform access control checks. A local attacker could improperly modify the system-wide OS fingerprint list. (CVE-2017-17450) The Linux ptrace code virtualizes access to the debug registers, and the virtualization code has incorrect error handling. This means that if you write an illegal value to, say, DR0, the internal state of the kernel's breakpoint tracking can become corrupt despite the fact that the ptrace() call will return -EINVAL. (CVE-2018-1000199) Mohamed Ghannam discovered a null pointer dereference in the RDS (Reliable Datagram Sockets) protocol implementation of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-5333) \u8303\u9f99\u98de discovered that a race condition existed in loop block device implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-5344) It was discovered that the Broadcom UniMAC MDIO bus controller driver in the Linux kernel did not properly validate device resources. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-8043) Update instructions: The problem can be corrected by updating your livepatches to the following versions: | Kernel | Version | flavors | |-----------------+----------+--------------------------| | 4.4.0-116.140 | 37.2 | generic, lowlatency | | 4.4.0-119.143 | 37.2 | generic, lowlatency | | 4.4.0-121.145 | 37.2 | generic, lowlatency | | 4.4.0-122.146 | 37.2 | generic, lowlatency | | 4.4.0-116.140~14.04.1 | 37.2 | generic, lowlatency | | 4.4.0-119.143~14.04.1 | 37.2 | generic, lowlatency | | 4.4.0-121.145~14.04.1 | 37.2 | generic, lowlatency | Additionally, you should install an updated kernel with these fixes and reboot at your convienience. References: CVE-2017-0861, CVE-2017-15129, CVE-2017-16995, CVE-2017-17448, CVE-2017-17450, CVE-2018-1000199, CVE-2018-5333, CVE-2018-5344, CVE-2018-8043 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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 iQIVAwUBWvDnfox+lLeg9Ub1AQhenRAAqMwu4bZQsbKC8grKg2RzPaQBWIsaTyoJ oeH95gVgZnjlBaxsmOiu8FDQHmhL29vSedjJajUUY+UgZUVO/Vs1PaGqsB7VBie6 1usNa/u20W4i4aTN5hQxzKnQE0BdIC/Hn3nDTVnF6+518Cor2Ig6JkUNfGbx3acf ePQz4MQEH2gj2NPVW0t1aC5VDHbOXiA818KUeLV9AtHXv7ccwgcIHAGyBPKFBpDe 8y8jgupmuHXiclxeIGbW02WpDjfGQVc9Bj65pKWa8F4MsA1/GPa2zPPGyweKfH6/ bSf/HdvcpeYVWX49YkJA0QDx8k4df0Xgi8Bs3apj4faXWWaMgtdSst+QdNHcIGIc /Mv8zkXibX1SjWQJvwr7+TjfB0Ncta1einV+jFqCWrkF/FM5WFuNLBnE443s3HOl mjisHpHWk+ZSDCMJMPg00AtaavtDasQCOTmINvB8ceRTVuKkoSoIQIma7CWgUQgz zRcFuFPazaYzFwFLu5QOiX1yXl3MmstrU4GTVwNsfxmHO9EAyI73R8ZrqEFkfwjf Wj3vVPYGk/NeU7gFbEQ5euZ/X6c72YkVxAsRyv5MzgRCTosSi2IrT7OCgEthc8sX 2EyhPcdrHW7VfYPbKNUPJO6ilr5Ok1j9bWY86B1x2Y7NXAV7qWGH9sMGzZomZiC1 FvKKZAdxL7E= =CpcD -----END PGP SIGNATURE-----