USN-2666-1: Linux kernel vulnerabilities
7 July 2015
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
A race condition was discovered in the Linux kernel's file_handle size
verification. A local user could exploit this flaw to read potentially
sensative memory locations. (CVE-2015-1420)
A underflow error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4001)
A bounds check error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4002)
A division by zero error was discovered in the Linux kernel's Ozmo Devices
USB over WiFi host controller driver. A remote attacker could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4003)
Carl H Lunde discovered missing consistency checks in the the Linux kernel's UDF
file system (CONFIG_UDF_FS). A local attacker could exploit this flaw to
cause a denial of service (system crash) by using a corrupted file system
image. (CVE-2015-4167)
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)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 14.10
-
linux-image-3.16.0-43-generic
-
3.16.0-43.58
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linux-image-3.16.0-43-generic-lpae
-
3.16.0-43.58
-
linux-image-3.16.0-43-lowlatency
-
3.16.0-43.58
-
linux-image-3.16.0-43-powerpc-e500mc
-
3.16.0-43.58
-
linux-image-3.16.0-43-powerpc-smp
-
3.16.0-43.58
-
linux-image-3.16.0-43-powerpc64-emb
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3.16.0-43.58
-
linux-image-3.16.0-43-powerpc64-smp
-
3.16.0-43.58
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.