USN-3017-2: Linux kernel (Raspberry Pi 2) vulnerabilities

Releases

• Ubuntu 15.10

Packages

• linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

Jesse Hertz and Tim Newsham discovered that the Linux netfilter
implementation did not correctly perform validation when handling 32 bit
compatibility IPT_SO_SET_REPLACE events on 64 bit platforms. A local
unprivileged attacker could use this to cause a denial of service (system
crash) or execute arbitrary code with administrative privileges.
(CVE-2016-4997)

Kangjie Lu discovered an information leak in the core USB implementation in
the Linux kernel. A local attacker could use this to obtain potentially
sensitive information from kernel memory. (CVE-2016-4482)

Kangjie Lu discovered an information leak in the timer handling
implementation in the Advanced Linux Sound Architecture (ALSA) subsystem of
the Linux kernel. A local attacker could use this to obtain potentially
sensitive information from kernel memory. (CVE-2016-4569, CVE-2016-4578)

Kangjie Lu discovered an information leak in the X.25 Call Request handling
in the Linux kernel. A local attacker could use this to obtain potentially
sensitive information from kernel memory. (CVE-2016-4580)

It was discovered that an information leak exists in the Rock Ridge
implementation in the Linux kernel. A local attacker who is able to mount a
malicious iso9660 file system image could exploit this flaw to obtain
potentially sensitive information from kernel memory. (CVE-2016-4913)

Baozeng Ding discovered that the Transparent Inter-process Communication
(TIPC) implementation in the Linux kernel did not verify socket existence
before use in some situations. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-4951)

Jesse Hertz and Tim Newsham discovered that the Linux netfilter
implementation did not correctly perform validation when handling
IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to
cause a denial of service (system crash) or obtain potentially sensitive
information from kernel memory. (CVE-2016-4998)

Update instructions

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

Ubuntu 15.10

• linux-image-4.2.0-1033-raspi2 - 4.2.0-1033.43

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.

References

• CVE-2016-4482
• CVE-2016-4569
• CVE-2016-4578
• CVE-2016-4580
• CVE-2016-4913
• CVE-2016-4951
• CVE-2016-4997
• CVE-2016-4998

Related notices

• USN-3020-1: linux-image-3.19.0-64-powerpc-smp, linux-image-3.19.0-64-lowlatency, linux-image-extra-3.19.0-64-generic, linux-image-3.19.0-64-generic, linux-lts-vivid, linux-image-3.19.0-64-powerpc-e500mc, linux-image-3.19.0-64-powerpc64-emb, linux-image-3.19.0-64-generic-lpae, linux-image-3.19.0-64-powerpc64-smp
• USN-3018-2: linux-lts-trusty, linux-image-3.13.0-91-generic, linux-image-3.13.0-91-generic-lpae
• USN-3018-1: linux-image-3.13.0-91-powerpc-e500mc, linux-image-3.13.0-91-generic-lpae, linux-image-3.13.0-91-lowlatency, linux-image-extra-3.13.0-91-generic, linux, linux-image-3.13.0-91-powerpc64-smp, linux-image-3.13.0-91-powerpc64-emb, linux-image-3.13.0-91-powerpc-e500, linux-image-3.13.0-91-generic, linux-image-3.13.0-91-powerpc-smp
• USN-3021-2: linux-image-3.2.0-1483-omap4, linux-ti-omap4
• USN-3021-1: linux-image-3.2.0-105-powerpc64-smp, linux-image-3.2.0-105-highbank, linux, linux-image-3.2.0-105-generic, linux-image-3.2.0-105-generic-pae, linux-image-3.2.0-105-virtual, linux-image-3.2.0-105-powerpc-smp, linux-image-3.2.0-105-omap
• USN-3019-1: linux-image-3.16.0-76-powerpc-e500mc, linux-image-extra-3.16.0-76-generic, linux-image-3.16.0-76-generic, linux-image-3.16.0-76-powerpc64-smp, linux-image-3.16.0-76-lowlatency, linux-image-3.16.0-76-generic-lpae, linux-lts-utopic, linux-image-3.16.0-76-powerpc-smp, linux-image-3.16.0-76-powerpc64-emb
• USN-3017-3: linux-image-4.2.0-41-powerpc64-emb, linux-image-extra-4.2.0-41-generic, linux-image-4.2.0-41-generic, linux-image-4.2.0-41-powerpc-smp, linux-lts-wily, linux-image-4.2.0-41-powerpc-e500mc, linux-image-4.2.0-41-generic-lpae, linux-image-4.2.0-41-lowlatency, linux-image-4.2.0-41-powerpc64-smp
• USN-3016-1: linux-image-4.4.0-28-generic, linux-image-4.4.0-28-lowlatency, linux-image-4.4.0-28-powerpc64-emb, linux-image-4.4.0-28-powerpc-smp, linux-image-4.4.0-28-powerpc64-smp, linux, linux-image-extra-4.4.0-28-generic, linux-image-4.4.0-28-generic-lpae, linux-image-4.4.0-28-powerpc-e500mc
• USN-3016-3: linux-image-4.4.0-1019-snapdragon, linux-snapdragon
• USN-3016-4: linux-lts-xenial, linux-image-4.4.0-28-generic, linux-image-4.4.0-28-lowlatency, linux-image-4.4.0-28-powerpc64-emb, linux-image-4.4.0-28-powerpc-smp, linux-image-4.4.0-28-powerpc64-smp, linux-image-extra-4.4.0-28-generic, linux-image-4.4.0-28-generic-lpae, linux-image-4.4.0-28-powerpc-e500mc
• USN-3016-2: linux-image-4.4.0-1016-raspi2, linux-raspi2
• USN-3017-1: linux-image-4.2.0-41-powerpc64-emb, linux-image-4.2.0-41-generic, linux-image-4.2.0-41-powerpc-smp, linux-image-4.2.0-41-powerpc-e500mc, linux, linux-image-4.2.0-41-generic-lpae, linux-image-4.2.0-41-lowlatency, linux-image-4.2.0-41-powerpc64-smp
• USN-3338-1: linux-image-powerpc-smp, linux-image-omap, linux-image-virtual, linux-image-3.2.0-128-generic-pae, linux-image-3.2.0-128-virtual, linux-image-3.2.0-128-powerpc64-smp, linux-image-3.2.0-128-generic, linux-image-highbank, linux-image-3.2.0-128-highbank, linux, linux-image-3.2.0-128-powerpc-smp, linux-image-generic-pae, linux-image-powerpc64-smp, linux-image-generic, linux-image-3.2.0-128-omap