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AUSCERT External Security Bulletin Redistribution
ESB-2018.1576
Linux kernel (Raspberry Pi 2, Snapdragon) vulnerabilities
23 May 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: linux-raspi2
linux-snapdragon
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-8822 CVE-2018-8781 CVE-2018-7995
CVE-2018-7757 CVE-2018-7480 CVE-2018-5803
CVE-2018-1130 CVE-2018-1068 CVE-2018-1065
CVE-2017-18222 CVE-2017-18208 CVE-2017-18203
CVE-2017-18193 CVE-2017-17975 CVE-2017-17449
Reference: ESB-2018.1575
ESB-2018.1549
ESB-2018.1359
ESB-2018.1336
Original Bulletin:
http://www.ubuntu.com/usn/usn-3656-1
http://www.ubuntu.com/usn/usn-3657-1
Comment: This bulletin contains two (2) Ubuntu security advisories.
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USN-3656-1: Linux kernel (Raspberry Pi 2, Snapdragon) vulnerabilities
22 May 2018
linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
o linux-raspi2 - Linux kernel for Raspberry Pi 2
o linux-snapdragon - Linux kernel for Snapdragon processors
Details
Tuba Yavuz discovered that a double-free error existed in the USBTV007 driver
of the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2017-17975)
It was discovered that a race condition existed in the F2FS implementation in
the Linux kernel. A local attacker could use this to cause a denial of service
(system crash). (CVE-2017-18193)
It was discovered that a buffer overflow existed in the Hisilicon HNS Ethernet
Device driver in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-18222)
It was discovered that the netfilter subsystem in the Linux kernel did not
validate that rules containing jumps contained user-defined chains. A local
attacker could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2018-1065)
It was discovered that the netfilter subsystem of the Linux kernel did not
properly validate ebtables offsets. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-1068)
It was discovered that a null pointer dereference vulnerability existed in the
DCCP protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-1130)
It was discovered that the SCTP Protocol implementation in the Linux kernel did
not properly validate userspace provided payload lengths in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2018-5803)
It was discovered that a double free error existed in the block layer subsystem
of the Linux kernel when setting up a request queue. A local attacker could use
this to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-7480)
It was discovered that a memory leak existed in the SAS driver subsystem of the
Linux kernel. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2018-7757)
It was discovered that a race condition existed in the x86 machine check
handler in the Linux kernel. A local privileged attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-7995)
Eyal Itkin discovered that the USB displaylink video adapter driver in the
Linux kernel did not properly validate mmap offsets sent from userspace. A
local attacker could use this to expose sensitive information (kernel memory)
or possibly execute arbitrary code. (CVE-2018-8781)
Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation
in the Linux kernel. A remote attacker controlling a malicious NCPFS server
could use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2018-8822)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04 LTS
linux-image-4.4.0-1090-raspi2 - 4.4.0-1090.98
linux-image-4.4.0-1093-snapdragon - 4.4.0-1093.98
linux-image-raspi2 - 4.4.0.1090.90
linux-image-snapdragon - 4.4.0.1093.85
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. 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
o CVE-2017-17975
o CVE-2017-18193
o CVE-2017-18222
o CVE-2018-1065
o CVE-2018-1068
o CVE-2018-1130
o CVE-2018-5803
o CVE-2018-7480
o CVE-2018-7757
o CVE-2018-7995
o CVE-2018-8781
o CVE-2018-8822
- --------------------------------------------------------------------------------
USN-3657-1: Linux kernel (Raspberry Pi 2) vulnerabilities
22 May 2018
linux-raspi2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 17.10
Summary
Several security issues were fixed in the Linux kernel.
Software Description
o linux-raspi2 - Linux kernel for Raspberry Pi 2
Details
It was discovered that the netlink subsystem in the Linux kernel did not
properly restrict observations of netlink messages to the appropriate net
namespace. A local attacker could use this to expose sensitive information
(kernel netlink traffic). (CVE-2017-17449)
Tuba Yavuz discovered that a double-free error existed in the USBTV007 driver
of the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2017-17975)
It was discovered that a race condition existed in the Device Mapper component
of the Linux kernel. A local attacker could use this to cause a denial of
service (system crash). (CVE-2017-18203)
It was discovered that an infinite loop could occur in the madvise(2)
implementation in the Linux kernel in certain circumstances. A local attacker
could use this to cause a denial of service (system hang). (CVE-2017-18208)
Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation
in the Linux kernel. A remote attacker controlling a malicious NCPFS server
could use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2018-8822)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 17.10
linux-image-4.13.0-1020-raspi2 - 4.13.0-1020.21
linux-image-raspi2 - 4.13.0.1020.18
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. 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
o CVE-2017-17449
o CVE-2017-17975
o CVE-2017-18203
o CVE-2017-18208
o CVE-2018-8822
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