USN-2680-1: Linux kernel (Trusty HWE) vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux-lts-trusty - Linux hardware enablement kernel from Trusty

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)

Update instructions

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

Ubuntu 12.04

• linux-image-3.13.0-58-generic - 3.13.0-58.97~precise1
• linux-image-3.13.0-58-generic-lpae - 3.13.0-58.97~precise1

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.

References

• CVE-2015-1805
• CVE-2015-4692
• CVE-2015-4700
• CVE-2015-5364
• CVE-2015-5366
• CVE-2015-5706

Related notices

• USN-2678-1: linux-image-3.2.0-88-generic, linux-image-3.2.0-88-powerpc-smp, linux-image-3.2.0-88-powerpc64-smp, linux-image-3.2.0-88-omap, linux-image-3.2.0-88-highbank, linux-image-3.2.0-88-virtual, linux, linux-image-3.2.0-88-generic-pae
• USN-2679-1: linux-ti-omap4, linux-image-3.2.0-1468-omap4
• USN-2681-1: linux-image-extra-3.13.0-58-generic, linux-image-3.13.0-58-generic-lpae, linux-image-3.13.0-58-powerpc64-smp, linux-image-3.13.0-58-powerpc-smp, linux-image-3.13.0-58-powerpc64-emb, linux-image-3.13.0-58-lowlatency, linux-image-3.13.0-58-powerpc-e500mc, linux-image-3.13.0-58-powerpc-e500, linux, linux-image-3.13.0-58-generic
• USN-2682-1: linux-image-extra-3.16.0-44-generic, linux-image-3.16.0-44-generic, linux-image-3.16.0-44-powerpc-smp, linux-image-3.16.0-44-powerpc-e500mc, linux-image-3.16.0-44-lowlatency, linux-image-3.16.0-44-generic-lpae, linux-image-3.16.0-44-powerpc64-emb, linux-image-3.16.0-44-powerpc64-smp, linux-lts-utopic
• USN-2685-1: linux-image-3.16.0-44-generic, linux-image-3.16.0-44-powerpc-smp, linux-image-3.16.0-44-powerpc-e500mc, linux-image-3.16.0-44-lowlatency, linux-image-3.16.0-44-generic-lpae, linux-image-3.16.0-44-powerpc64-emb, linux-image-3.16.0-44-powerpc64-smp, linux
• USN-2684-1: linux-image-3.19.0-23-powerpc64-smp, linux-image-3.19.0-23-powerpc64-emb, linux-image-3.19.0-23-generic, linux-image-3.19.0-23-generic-lpae, linux-image-3.19.0-23-powerpc-smp, linux, linux-image-3.19.0-23-lowlatency, linux-image-3.19.0-23-powerpc-e500mc
• USN-2683-1: linux-image-3.19.0-23-powerpc64-smp, linux-image-extra-3.19.0-23-generic, linux-image-3.19.0-23-powerpc64-emb, linux-image-3.19.0-23-generic, linux-image-3.19.0-23-generic-lpae, linux-image-3.19.0-23-powerpc-smp, linux-image-3.19.0-23-lowlatency, linux-image-3.19.0-23-powerpc-e500mc, linux-lts-vivid
• USN-2666-1: linux-image-3.16.0-43-powerpc64-emb, linux-image-3.16.0-43-powerpc64-smp, linux-image-3.16.0-43-powerpc-smp, linux-image-3.16.0-43-lowlatency, linux-image-3.16.0-43-generic, linux-image-3.16.0-43-generic-lpae, linux-image-3.16.0-43-powerpc-e500mc, linux
• USN-2664-1: linux-image-3.16.0-43-powerpc64-emb, linux-image-3.16.0-43-powerpc64-smp, linux-image-extra-3.16.0-43-generic, linux-image-3.16.0-43-powerpc-smp, linux-image-3.16.0-43-lowlatency, linux-image-3.16.0-43-generic, linux-image-3.16.0-43-generic-lpae, linux-image-3.16.0-43-powerpc-e500mc, linux-lts-utopic
• USN-2713-1: linux-image-3.2.0-89-highbank, linux-image-3.2.0-89-virtual, linux-image-3.2.0-89-generic-pae, linux-image-3.2.0-89-omap, linux, linux-image-3.2.0-89-powerpc-smp, linux-image-3.2.0-89-generic, linux-image-3.2.0-89-powerpc64-smp
• USN-2714-1: linux-image-3.2.0-1469-omap4, linux-ti-omap4
• USN-2667-1: linux-image-3.19.0-22-generic-lpae, linux-image-3.19.0-22-powerpc-e500mc, linux-image-3.19.0-22-powerpc-smp, linux-image-3.19.0-22-lowlatency, linux-image-3.19.0-22-powerpc64-emb, linux-image-3.19.0-22-powerpc64-smp, linux, linux-image-3.19.0-22-generic
• USN-2665-1: linux-image-3.19.0-22-generic-lpae, linux-image-3.19.0-22-powerpc-e500mc, linux-image-3.19.0-22-powerpc-smp, linux-image-extra-3.19.0-22-generic, linux-image-3.19.0-22-lowlatency, linux-image-3.19.0-22-powerpc64-emb, linux-image-3.19.0-22-powerpc64-smp, linux-image-3.19.0-22-generic, linux-lts-vivid