USN-3697-1: Linux kernel vulnerabilities
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 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)
Jann Horn discovered that the 32 bit adjtimex() syscall implementation for 64 bit Linux kernels did not properly initialize memory returned to user space in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-11508)
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 17.10
- linux-image-4.13.0-1023-raspi2 - 4.13.0-1023.24
- linux-image-4.13.0-46-generic - 4.13.0-46.51
- linux-image-4.13.0-46-generic-lpae - 4.13.0-46.51
- linux-image-4.13.0-46-lowlatency - 4.13.0-46.51
- linux-image-generic - 4.13.0.46.49
- linux-image-generic-lpae - 4.13.0.46.49
- linux-image-lowlatency - 4.13.0.46.49
- linux-image-raspi2 - 4.13.0.1023.21
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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
from Ubuntu Security Notices https://ift.tt/2tLFFEw