Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.3054 Linux kernel vulnerabilities 21 December 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Confidential Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-7916 CVE-2016-6213 Reference: ASB-2016.0103 ESB-2016.2687 Original Bulletin: http://www.ubuntu.com/usn/usn-3160-1 http://www.ubuntu.com/usn/usn-3160-2 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3160-1 December 20, 2016 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 kernel. Software Description: - - linux: Linux kernel Details: CAI Qian discovered that shared bind mounts in a mount namespace exponentially added entries without restriction to the Linux kernel's mount table. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-6213) It was discovered that a race condition existed in the procfs environ_read function in the Linux kernel, leading to an integer underflow. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2016-7916) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-3.13.0-106-generic 3.13.0-106.153 linux-image-3.13.0-106-generic-lpae 3.13.0-106.153 linux-image-3.13.0-106-lowlatency 3.13.0-106.153 linux-image-3.13.0-106-powerpc-e500 3.13.0-106.153 linux-image-3.13.0-106-powerpc-e500mc 3.13.0-106.153 linux-image-3.13.0-106-powerpc-smp 3.13.0-106.153 linux-image-3.13.0-106-powerpc64-emb 3.13.0-106.153 linux-image-3.13.0-106-powerpc64-smp 3.13.0-106.153 linux-image-generic 3.13.0.106.114 linux-image-generic-lpae 3.13.0.106.114 linux-image-lowlatency 3.13.0.106.114 linux-image-powerpc-e500 3.13.0.106.114 linux-image-powerpc-e500mc 3.13.0.106.114 linux-image-powerpc-smp 3.13.0.106.114 linux-image-powerpc64-emb 3.13.0.106.114 linux-image-powerpc64-smp 3.13.0.106.114 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: http://www.ubuntu.com/usn/usn-3160-1 CVE-2016-6213, CVE-2016-7916 Package Information: https://launchpad.net/ubuntu/+source/linux/3.13.0-106.153 ========================================================================== Ubuntu Security Notice USN-3160-2 December 20, 2016 linux-lts-trusty vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 12.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise Details: USN-3160-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS. CAI Qian discovered that shared bind mounts in a mount namespace exponentially added entries without restriction to the Linux kernel's mount table. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-6213) It was discovered that a race condition existed in the procfs environ_read function in the Linux kernel, leading to an integer underflow. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2016-7916) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.13.0-106-generic 3.13.0-106.153~precise1 linux-image-3.13.0-106-generic-lpae 3.13.0-106.153~precise1 linux-image-generic-lpae-lts-trusty 3.13.0.106.97 linux-image-generic-lts-trusty 3.13.0.106.97 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: http://www.ubuntu.com/usn/usn-3160-2 http://www.ubuntu.com/usn/usn-3160-1 CVE-2016-6213, CVE-2016-7916 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-106.153~precise1 - --------------------------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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBWFomCox+lLeg9Ub1AQj0WQ//Tw5K/Pay60wgut2CukEGBhd2+O0spvK2 NM9r9y3d57b/f+VYQzmUKRtPH2Lx+VLwJVclR89miAUBAL2kilvB7T51CEthAfqS C7NcBSqKcAq6is0A4iy3Cv9SsYy9dExDNL/MKD68FDwqjt5LKl5YN6zvU0CKqWXK gfbG3c3VjRifr3L42oEQz8FrgtEUeMaXLS0kbDj6GM1fLGdhZO9J+kYZoubYdgEB vqMqi72751ufKtosPf/vt9UemWnvunjvPlKl7ONxTtGaCneHAjgsKTsfDkqn3gLf yMq4lMEynCaw0DbVLo04mowzr72a3GuxhrluNcuW5rNec9bbtI2oU/kE7J7B7Ql3 40WEcMpxkX8JZXKgX1Mtr4+TJdsmQ557pxWyEQqCZUzbc9CkxxPLzv1ST8RVxy/K LheMttN5M60XLwBWeOpyAz74WYyyO8kO7nQurxx7UANWAXkEHjSmxBDIGHB2Q8cG wbKhB/B5eGlX/LM/Of0lPSgDcXLFGJorWYVJL1iN6oTLoVegNTR4P7x1TrcjaNdS y83B40p/KzQ+KQWAKykYzr+l1nzJlzNtrTfeZmrDBXjn08wGVRQl0s/0eJ9vKZz0 na8gJGO+VKASKlWMX35Aevlx1qP5n+gHPMSNVsDDtpBbl5JBsBPOtBStMnHe5MWC DpvqEaWVXMk= =yygB -----END PGP SIGNATURE-----