Ubuntu Security Notice USN-2797-1
5th November, 2015
linux-lts-utopic vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.04 LTS
Summary
Several security issues were fixed in the kernel.
Software description
- linux-lts-utopic
– Linux hardware enablement kernel from Utopic
Details
It was discovered that the Linux kernel did not check if a new IPv6 MTU set
by a user space application was valid. A remote attacker could forge a
route advertisement with an invalid MTU that a user space daemon like
NetworkManager would honor and apply to the kernel, causing a denial of
service. (CVE-2015-0272)
It was discovered that in certain situations, a directory could be renamed
outside of a bind mounted location. An attacker could use this to escape
bind mount containment and gain access to sensitive information.
(CVE-2015-2925)
Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained
hardcoded attributes about the USB devices. An attacker could construct a
fake WhiteHEAT USB device that, when inserted, causes a denial of service
(system crash). (CVE-2015-5257)
It was discovered that the SCTP protocol implementation in the Linux kernel
performed an incorrect sequence of protocol-initialization steps. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2015-5283)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 14.04 LTS:
-
linux-image-3.16.0-52-powerpc-smp
3.16.0-52.71~14.04.1
-
linux-image-3.16.0-52-powerpc64-smp
3.16.0-52.71~14.04.1
-
linux-image-3.16.0-52-powerpc64-emb
3.16.0-52.71~14.04.1
-
linux-image-3.16.0-52-powerpc-e500mc
3.16.0-52.71~14.04.1
-
linux-image-3.16.0-52-generic-lpae
3.16.0-52.71~14.04.1
-
linux-image-3.16.0-52-lowlatency
3.16.0-52.71~14.04.1
-
linux-image-3.16.0-52-generic
3.16.0-52.71~14.04.1
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. 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.