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USN-2681-1: Linux kernel vulnerabilities

23 July 2015

Several security issues were fixed in the kernel.

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Releases

Packages

Details

A flaw was discovered in the user space memory copying for the pipe iovecs
in the Linux kernel. An unprivileged local user could exploit this flaw to
cause a denial of service (system crash) or potentially escalate their
privileges. (CVE-2015-1805)

A flaw was discovered in the kvm (kernel virtual machine) subsystem's
kvm_apic_has_events function. A unprivileged local user could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4692)

Daniel Borkmann reported a kernel crash in the Linux kernel's BPF filter
JIT optimization. A local attacker could exploit this flaw to cause a
denial of service (system crash). (CVE-2015-4700)

A flaw was discovered in how the Linux kernel handles invalid UDP
checksums. A remote attacker could exploit this flaw to cause a denial of
service using a flood of UDP packets with invalid checksums.
(CVE-2015-5364)

A flaw was discovered in how the Linux kernel handles invalid UDP
checksums. A remote attacker can cause a denial of service against
applications that use epoll by injecting a single packet with an invalid
checksum. (CVE-2015-5366)

A double free flaw was discovered in the Linux kernel's path lookup. A
local user could cause a denial of service (Oops). (CVE-2015-5706)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.04

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

Related notices

  • USN-2678-1: linux-image-3.2.0-88-generic-pae, linux-image-3.2.0-88-generic, linux-image-3.2.0-88-powerpc-smp, linux-image-3.2.0-88-virtual, linux-image-3.2.0-88-powerpc64-smp, linux-image-3.2.0-88-omap, linux-image-3.2.0-88-highbank, linux
  • USN-2679-1: linux-ti-omap4, linux-image-3.2.0-1468-omap4
  • USN-2680-1: linux-image-3.13.0-58-generic, linux-lts-trusty, linux-image-3.13.0-58-generic-lpae
  • USN-2682-1: linux-image-3.16.0-44-powerpc64-smp, linux-image-3.16.0-44-powerpc-e500mc, linux-image-extra-3.16.0-44-generic, linux-image-3.16.0-44-generic, linux-image-3.16.0-44-generic-lpae, linux-image-3.16.0-44-powerpc64-emb, linux-image-3.16.0-44-powerpc-smp, linux-lts-utopic, linux-image-3.16.0-44-lowlatency
  • USN-2685-1: linux-image-3.16.0-44-powerpc64-smp, linux-image-3.16.0-44-powerpc-e500mc, linux-image-3.16.0-44-generic, linux-image-3.16.0-44-generic-lpae, linux-image-3.16.0-44-powerpc64-emb, linux-image-3.16.0-44-powerpc-smp, linux, linux-image-3.16.0-44-lowlatency
  • USN-2684-1: linux-image-3.19.0-23-generic, linux-image-3.19.0-23-powerpc64-emb, linux-image-3.19.0-23-powerpc64-smp, linux-image-3.19.0-23-lowlatency, linux-image-3.19.0-23-powerpc-smp, linux, linux-image-3.19.0-23-generic-lpae, linux-image-3.19.0-23-powerpc-e500mc
  • USN-2683-1: linux-image-3.19.0-23-generic, linux-image-3.19.0-23-powerpc64-emb, linux-image-3.19.0-23-powerpc64-smp, linux-image-3.19.0-23-lowlatency, linux-image-3.19.0-23-powerpc-smp, linux-image-extra-3.19.0-23-generic, linux-lts-vivid, linux-image-3.19.0-23-generic-lpae, linux-image-3.19.0-23-powerpc-e500mc
  • USN-2666-1: linux-image-3.16.0-43-powerpc-smp, linux-image-3.16.0-43-lowlatency, linux-image-3.16.0-43-powerpc64-emb, linux-image-3.16.0-43-generic-lpae, linux-image-3.16.0-43-generic, linux-image-3.16.0-43-powerpc64-smp, linux, linux-image-3.16.0-43-powerpc-e500mc
  • USN-2664-1: linux-image-3.16.0-43-powerpc-smp, linux-image-3.16.0-43-powerpc64-emb, linux-image-3.16.0-43-generic-lpae, linux-image-3.16.0-43-generic, linux-image-extra-3.16.0-43-generic, linux-image-3.16.0-43-powerpc64-smp, linux-image-3.16.0-43-lowlatency, linux-lts-utopic, linux-image-3.16.0-43-powerpc-e500mc
  • USN-2713-1: linux-image-3.2.0-89-generic-pae, linux-image-3.2.0-89-powerpc64-smp, linux-image-3.2.0-89-omap, linux-image-3.2.0-89-powerpc-smp, linux, linux-image-3.2.0-89-generic, linux-image-3.2.0-89-virtual, linux-image-3.2.0-89-highbank
  • USN-2714-1: linux-ti-omap4, linux-image-3.2.0-1469-omap4
  • USN-2667-1: linux-image-3.19.0-22-powerpc64-emb, linux-image-3.19.0-22-powerpc-e500mc, linux-image-3.19.0-22-powerpc-smp, linux-image-3.19.0-22-generic, linux-image-3.19.0-22-powerpc64-smp, linux, linux-image-3.19.0-22-lowlatency, linux-image-3.19.0-22-generic-lpae
  • USN-2665-1: linux-image-extra-3.19.0-22-generic, linux-image-3.19.0-22-powerpc64-emb, linux-image-3.19.0-22-powerpc-e500mc, linux-image-3.19.0-22-powerpc-smp, linux-image-3.19.0-22-generic, linux-lts-vivid, linux-image-3.19.0-22-powerpc64-smp, linux-image-3.19.0-22-lowlatency, linux-image-3.19.0-22-generic-lpae