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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2980 Linux kernel vulnerabilities 22 November 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux linux-raspi2 Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-1000255 CVE-2017-16534 CVE-2017-16533 CVE-2017-16531 CVE-2017-16530 CVE-2017-16529 CVE-2017-16527 CVE-2017-16526 CVE-2017-16525 CVE-2017-15649 CVE-2017-15537 CVE-2017-15265 CVE-2017-14954 CVE-2017-14489 CVE-2017-14156 CVE-2017-12192 CVE-2017-12190 CVE-2017-12188 CVE-2017-12154 CVE-2017-12153 Reference: ESB-2017.2979 Original Bulletin: http://www.ubuntu.com/usn/usn-3487-1 Comment: This advisory shares some CVEs with ESB-2017.2978 but adds others. It is specific to Ubuntu 17.10. This advisory references vulnerabilities in the Linux kernel that also affect distributions other than Ubuntu. It is recommended that administrators running Linux check for an updated version of the kernel for their system. - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3487-1 November 21, 2017 linux, linux-raspi2 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 17.10 Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux: Linux kernel - - linux-raspi2: Linux kernel for Raspberry Pi 2 Details: It was discovered that the KVM subsystem in the Linux kernel did not properly keep track of nested levels in guest page tables. A local attacker in a guest VM could use this to cause a denial of service (host OS crash) or possibly execute arbitrary code in the host OS. (CVE-2017-12188) It was discovered that on the PowerPC architecture, the kernel did not properly sanitize the signal stack when handling sigreturn(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-1000255) Bo Zhang discovered that the netlink wireless configuration interface in the Linux kernel did not properly validate attributes when handling certain requests. A local attacker with the CAP_NET_ADMIN could use this to cause a denial of service (system crash). (CVE-2017-12153) 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) Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel did not properly track reference counts when merging buffers. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2017-12190) It was discovered that the key management subsystem in the Linux kernel did not properly restrict key reads on negatively instantiated keys. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-12192) It was discovered that the ATI Radeon framebuffer driver in the Linux kernel did not properly initialize a data structure returned to user space. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2017-14156) ChunYu Wang discovered that the iSCSI transport implementation in the Linux kernel did not properly validate data structures. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14489) Alexander Potapenko discovered an information leak in the waitid implementation of the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2017-14954) 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) Dmitry Vyukov discovered that the Floating Point Unit (fpu) subsystem in the Linux kernel did not properly handle attempts to set reserved bits in a task's extended state (xstate) area. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-15537) It was discovered that a race condition existed in the packet fanout 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-2017-15649) Andrey Konovalov discovered a use-after-free vulnerability in the USB serial console driver in the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16525) Andrey Konovalov discovered that the Ultra Wide Band driver in the Linux kernel did not properly check for an error condition. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16526) Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16527) Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel did not properly validate USB audio buffer descriptors. A physically proximate attacker could use this cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16529) Andrey Konovalov discovered that the USB unattached storage driver in the Linux kernel contained out-of-bounds error when handling alternative settings. A physically proximate attacker could use to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16530) Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate USB interface association descriptors. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-16531) Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate USB HID descriptors. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-16533) Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate CDC metadata. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16534) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.10: linux-image-4.13.0-1006-raspi2 4.13.0-1006.6 linux-image-4.13.0-17-generic 4.13.0-17.20 linux-image-4.13.0-17-generic-lpae 4.13.0-17.20 linux-image-4.13.0-17-lowlatency 4.13.0-17.20 linux-image-generic 4.13.0.17.18 linux-image-generic-lpae 4.13.0.17.18 linux-image-lowlatency 4.13.0.17.18 linux-image-raspi2 4.13.0.1006.4 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://www.ubuntu.com/usn/usn-3487-1 CVE-2017-1000255, CVE-2017-12153, CVE-2017-12154, CVE-2017-12188, CVE-2017-12190, CVE-2017-12192, CVE-2017-14156, CVE-2017-14489, CVE-2017-14954, CVE-2017-15265, CVE-2017-15537, CVE-2017-15649, CVE-2017-16525, CVE-2017-16526, CVE-2017-16527, CVE-2017-16529, CVE-2017-16530, CVE-2017-16531, CVE-2017-16533, CVE-2017-16534 Package Information: https://launchpad.net/ubuntu/+source/linux/4.13.0-17.20 https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1006.6 - --------------------------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. 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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 iQIVAwUBWhTQ0Yx+lLeg9Ub1AQgLtg/9G7wWf2668LHgpNH61G0DiPocPG9Kg2Di 6cyJfDD7k2a8AvEulj6KxyDYivZMOzSUTi1tXnmEtYQo7ljbS9f8bV71IvHLFsGE hse8DpXvxFDDPJQTAGCOx4KBjaq/M5CEQEmoG3D6kKcgRtmVqWsy7lz75UY0MtpT ayA3gTUNjIJgdNeZoQyGGnqteOQtaKAoKLWpnQpeNbp5fy+MYRkZfMz+kxLoZkcW RQm//fd7oiVMzU0sPgsdh2p3nY0wYVWDir3eFHhEOvy/D3mDH3rkHxd2Atjm00gn EF8YDyjx/mArsSYxcNeyxlFPv8ldTbOXHNj6cWT22/ESoDUGXloyuaGI/VkBJR9T mHybmHAGs/1OUzHufAEt1Ipjc0sDcL51c61Jl4Bk5Lfhxtqjka7jP44NT5W++url 8mKU5oEexhYkj8jKK0DUlnW6X/XC8Vyfk7oREjMy2PhGxA7Y3fS8Wwwf35h3/TU1 6GG6dqj1e48ErjRRckoJfJ9kINtRNU9vw2x42yp1xjUEaYwi6tRCqgEnARRVrODX LjiMeAeSwsI1VZjVZYH7VbMunVw5VtRbJxwmxpTcPNXBjjTL3U7JpnBUb5IvMtYp lho7YaVbu8EAOKCmU+Pjxkh4uHFG+U2sh6d0ODgEXG/Guk3vSAULeCBg36+Ax9oq FCHCOAnk/p4= =RJHG -----END PGP SIGNATURE-----