USN-3190-1: Linux kernel vulnerabilities
3 February 2017
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.10
Several security issues were fixed in the kernel.
- linux - Linux kernel
Mikulas Patocka discovered that the asynchronous multibuffer cryptographic daemon (mcryptd) in the Linux kernel did not properly handle being invoked with incompatible algorithms. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-10147)
It was discovered that a use-after-free existed in the KVM susbsystem of the Linux kernel when creating devices. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-10150)
Qidan He discovered that the ICMP implementation in the Linux kernel did not properly check the size of an ICMP header. A local attacker with CAP_NET_ADMIN could use this to expose sensitive information. (CVE-2016-8399)
Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build() function in the Linux kernel. A local attacker could use to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-8632)
Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly restrict the VCPU index when I/O APIC is enabled, An attacker in a guest VM could use this to cause a denial of service (system crash) or possibly gain privileges in the host OS. (CVE-2016-9777)
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 16.10
- linux-image-4.8.0-37-generic - 4.8.0-37.39
- linux-image-4.8.0-37-generic-lpae - 4.8.0-37.39
- linux-image-4.8.0-37-lowlatency - 4.8.0-37.39
- linux-image-4.8.0-37-powerpc-e500mc - 4.8.0-37.39
- linux-image-4.8.0-37-powerpc-smp - 4.8.0-37.39
- linux-image-4.8.0-37-powerpc64-emb - 4.8.0-37.39
- linux-image-generic - 188.8.131.52.46
- linux-image-generic-lpae - 184.108.40.206.46
- linux-image-lowlatency - 220.127.116.11.46
- linux-image-powerpc-e500mc - 18.104.22.168.46
- linux-image-powerpc-smp - 22.214.171.124.46
- linux-image-powerpc64-emb - 126.96.36.199.46
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.