Home / mailings [USN-2996-1] Linux kernel vulnerabilities
Posted on 10 June 2016
Ubuntu Security==========================
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Ubuntu Security Notice USN-2996-1
June 10, 2016
linux vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
Jann Horn discovered that eCryptfs improperly attempted to use the mmap()=
handler of a lower filesystem that did not implement one, causing a
recursive page fault to occur. A local unprivileged attacker could use to=
cause a denial of service (system crash) or possibly execute arbitrary co=
de
with administrative privileges. (CVE-2016-1583)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kern=
el
did not properly validate USB device descriptors. An attacker with physic=
al
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in th=
e
Linux kernel did not properly validate USB device descriptors. An attacke=
r
with physical access could use this to cause a denial of service (system
crash). (CVE-2016-2185)
Ralf Spenneberg discovered that the PowerMate USB driver in the Linux
kernel did not properly validate USB device descriptors. An attacker with=
physical access could use this to cause a denial of service (system crash=
).
(CVE-2016-2186)
Ralf Spenneberg discovered that the Linux kernel's GTCO digitizer USB
device driver did not properly validate endpoint descriptors. An attacker=
with physical access could use this to cause a denial of service (system
crash). (CVE-2016-2187)
Ralf Spenneberg discovered that the I/O-Warrior USB device driver in the
Linux kernel did not properly validate USB device descriptors. An attacke=
r
with physical access could use this to cause a denial of service (system
crash). (CVE-2016-2188)
Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that t=
he
MCT USB RS232 Converter device driver in the Linux kernel did not properl=
y
validate USB device descriptors. An attacker with physical access could u=
se
this to cause a denial of service (system crash). (CVE-2016-3136)
Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that t=
he
Cypress M8 USB device driver in the Linux kernel did not properly validat=
e
USB device descriptors. An attacker with physical access could use this t=
o
cause a denial of service (system crash). (CVE-2016-3137)
Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that t=
he
USB abstract device control driver for modems and ISDN adapters did not
validate endpoint descriptors. An attacker with physical access could use=
this to cause a denial of service (system crash). (CVE-2016-3138)
Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that t=
he
Linux kernel's USB driver for Digi AccelePort serial converters did not
properly validate USB device descriptors. An attacker with physical acces=
s
could use this to cause a denial of service (system crash). (CVE-2016-314=
0)
It was discovered that the IPv4 implementation in the Linux kernel did no=
t
perform the destruction of inet device objects properly. An attacker in a=
guest OS could use this to cause a denial of service (networking outage) =
in
the host OS. (CVE-2016-3156)
Andy Lutomirski discovered that the Linux kernel did not properly context=
-
switch IOPL on 64-bit PV Xen guests. An attacker in a guest OS could use
this to cause a denial of service (guest OS crash), gain privileges, or
obtain sensitive information. (CVE-2016-3157)
Hector Marco and Ismael Ripoll discovered that the Linux kernel would
improperly disable Address Space Layout Randomization (ASLR) for x86
processes running in 32 bit mode if stack-consumption resource limits wer=
e
disabled. A local attacker could use this to make it easier to exploit an=
existing vulnerability in a setuid/setgid program. (CVE-2016-3672)
It was discovered that an out-of-bounds write could occur when handling
incoming packets in the USB/IP implementation in the Linux kernel. A remo=
te
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-3955)
Kangjie Lu discovered an information leak in the ANSI/IEEE 802.2 LLC type=
2
Support implementations in the Linux kernel. A local attacker could use
this to obtain potentially sensitive information from kernel memory.
(CVE-2016-4485)
Kangjie Lu discovered an information leak in the routing netlink socket
interface (rtnetlink) implementation in the Linux kernel. A local attacke=
r
could use this to obtain potentially sensitive information from kernel
memory. (CVE-2016-4486)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
linux-image-3.2.0-104-generic 3.2.0-104.145
linux-image-3.2.0-104-generic-pae 3.2.0-104.145
linux-image-3.2.0-104-highbank 3.2.0-104.145
linux-image-3.2.0-104-omap 3.2.0-104.145
linux-image-3.2.0-104-powerpc-smp 3.2.0-104.145
linux-image-3.2.0-104-powerpc64-smp 3.2.0-104.145
linux-image-3.2.0-104-virtual 3.2.0-104.145
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:
http://www.ubuntu.com/usn/usn-2996-1
CVE-2016-1583, CVE-2016-2184, CVE-2016-2185, CVE-2016-2186,
CVE-2016-2187, CVE-2016-2188, CVE-2016-3136, CVE-2016-3137,
CVE-2016-3138, CVE-2016-3140, CVE-2016-3156, CVE-2016-3157,
CVE-2016-3672, CVE-2016-3955, CVE-2016-4485, CVE-2016-4486
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-104.145
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