Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1923 Linux kernel vulnerabilities for some Ubuntu versions 3 July 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-7757 CVE-2018-7755 CVE-2018-6927 CVE-2018-5803 CVE-2018-5750 CVE-2018-3665 CVE-2018-1130 CVE-2017-15265 CVE-2017-12193 CVE-2017-12154 Reference: ASB-2018.0145 ESB-2018.1917 ESB-2018.1916 ESB-2018.1028 ESB-2018.0533.2 Original Bulletin: http://www.ubuntu.com/usn/usn-3698-1 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3698-1 July 02, 2018 linux vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux: Linux kernel Details: It was discovered that the nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service (system crash). (CVE-2017-12154) Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array implementation in the Linux kernel sometimes did not properly handle adding a new entry. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-12193) It was discovered that a race condition existed in the ALSA subsystem of the Linux kernel when creating and deleting a port via ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15265) It was discovered that a null pointer dereference vulnerability existed in the DCCP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-1130) Julian Stecklina and Thomas Prescher discovered that FPU register states (such as MMX, SSE, and AVX registers) which are lazily restored are potentially vulnerable to a side channel attack. A local attacker could use this to expose sensitive information. (CVE-2018-3665) Wang Qize discovered that an information disclosure vulnerability existed in the SMBus driver for ACPI Embedded Controllers in the Linux kernel. A local attacker could use this to expose sensitive information (kernel pointer addresses). (CVE-2018-5750) It was discovered that the SCTP Protocol implementation in the Linux kernel did not properly validate userspace provided payload lengths in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-5803) It was discovered that an integer overflow error existed in the futex implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-6927) It was discovered that an information leak vulnerability existed in the floppy driver in the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-7755) It was discovered that a memory leak existed in the SAS driver subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2018-7757) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-3.13.0-153-generic 3.13.0-153.203 linux-image-3.13.0-153-generic-lpae 3.13.0-153.203 linux-image-3.13.0-153-lowlatency 3.13.0-153.203 linux-image-3.13.0-153-powerpc-e500 3.13.0-153.203 linux-image-3.13.0-153-powerpc-e500mc 3.13.0-153.203 linux-image-3.13.0-153-powerpc-smp 3.13.0-153.203 linux-image-3.13.0-153-powerpc64-emb 3.13.0-153.203 linux-image-3.13.0-153-powerpc64-smp 3.13.0-153.203 linux-image-generic 3.13.0.153.163 linux-image-generic-lpae 3.13.0.153.163 linux-image-lowlatency 3.13.0.153.163 linux-image-powerpc-e500 3.13.0.153.163 linux-image-powerpc-e500mc 3.13.0.153.163 linux-image-powerpc-smp 3.13.0.153.163 linux-image-powerpc64-emb 3.13.0.153.163 linux-image-powerpc64-smp 3.13.0.153.163 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: https://usn.ubuntu.com/usn/usn-3698-1 CVE-2017-12154, CVE-2017-12193, CVE-2017-15265, CVE-2018-1130, CVE-2018-3665, CVE-2018-5750, CVE-2018-5803, CVE-2018-6927, CVE-2018-7755, CVE-2018-7757 Package Information: https://launchpad.net/ubuntu/+source/linux/3.13.0-153.203 - -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEpgY7tWAjCaQ8jrvULwmejQBegfQFAls6jaEACgkQLwmejQBe gfTz/g/9GArSP5Cz+tAjn9UrO4DRqiDvT2rJxF8j5cjyrLmQ8FwcnFmoB2Io3ZOZ udu3CRUG8KI+wh/am8smZ6osXnwASlQQdF1J/w5kxoHR2lHzih0d/iUxSJFV+uHF Y8uMbw5Ud4gVUP6vfTcQzyMqd9ZVqTIcTElcPGW2aKxvH1XsLW5Cs9z85S6MoaCx 78O9OMpY2PKRzV+EVVLaMCVIIa/s3oyr90OqFO7OguemVM8JtrFfMLyN57CoZDU/ 1yEj0iJ6aXvH9UOWr3cBHEg7OabCZ9SCAGp2p2ZKPyWJWUp9YpzuJO8Ch3bEfkRW quY/y7Cegn0DGy97sCVJ5Ms67afgUkktTQ6dlnpysg5vptHn0A6hlSbxZNtzGl1s HyCFmdZDeyM79TedyA9ZWVsIR6OVjN1DObcDHeuKpnsDmzJsUpGGyg9B5TasIY1F gurTT5RzulKtf+ksg3Q5TDhXwbKTa5p1JV5x9xubE74gGuI2IZMmnmeYcnLjvqLq 6S4wChUJvSh2jQtlZdSbOf3XdyIgx/8PcaEjYucQDfPeLC+Kokjwu0l/70PuVe76 jtbsL8/DcVn/KERpGrVXgSAbncwSOxvPpFFldyGezMgu71IJ9Vy3GPAlOsTiW1Fx QvUQsVBTUQhYPkaboUpJEWWfcysJEXrFC/7jTTnUU4cwZSrN4zQ= =RRRG - -----END PGP SIGNATURE----- - --------------------------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 iQIVAwUBWzr7aGaOgq3Tt24GAQgJGRAAvsLiIZgCJaJ2kK+l6pu0xyNWx3rka0Rx HcfxV+Mi8lE/Xr3ZGoFERQv3+MVEnd8MAvhc3Ak0tgNVDaEZ4vrQpIpMrDOjIvWW MCAQtocRiKgNAJbXsb15kag8PdJdJiGVw6VfTJefponmGAR/k73inLJkEGjjgHYQ HXlBrKTlMpf3xMddIFIV3Lrxi3/QHxYYYNl0iO1GtyBiwkA7+E+s23RsfLbQEY2U bN/hMSeQQb5WllfhHk8QpadyAQPW1x6r07Xbi/jkp0QAjPgTEjWacPdNFB8uysub BI8SEGReBgGJWxd0AfT22Grr4N0aMPUWol6D/84emOFGHm8ggKa7NTLlhvan5bCp y9TPmRB/nEhWNZGF5m5Z2oIQ3BrqVAqV1Qvb1Kb82E/cwBg59B7dShHtBcuOgGDg R/i0dK8+qzer5fFn+d3AUSVl5MPe6yI33UREREl0/Syq1CaFbMZF/Ku0UdFxBMMG 3n3CFIRPgaEXkcVF5m4hM9EAL9dQ9bWPiOKk9efEStkYAH2GByE/67LSjPmB/MOd 9JpS7WlSKMqVYHs9UyZbc3UNGDNGCCsMViHrdPtEszKHCMnZfxabtOC4FksWsbvS DNWPS7L2WRZfvj2ajpnYPMlB0QY6rF/xZgJBDK537nWQ0KpZVPdGmz3bi/ZvY1W0 cPEZRnYKEZk= =8M8m -----END PGP SIGNATURE-----