USN-3583-1: Linux kernel vulnerabilities

23 February 2018

Several security issues were fixed in the Linux kernel.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

Details

It was discovered that an out-of-bounds write vulnerability existed in the
Flash-Friendly File System (f2fs) in the Linux kernel. An attacker could
construct a malicious file system that, when mounted, could cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2017-0750)

It was discovered that a race condition leading to a use-after-free
vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-0861)

It was discovered that the KVM implementation in the Linux kernel allowed
passthrough of the diagnostic I/O port 0x80. An attacker in a guest VM
could use this to cause a denial of service (system crash) in the host OS.
(CVE-2017-1000407)

Bo Zhang discovered that the netlink wireless configuration interface in
the Linux kernel did not properly validate attributes when handling certain
requests. A local attacker with the CAP_NET_ADMIN could use this to cause a
denial of service (system crash). (CVE-2017-12153)

Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel
did not properly track reference counts when merging buffers. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2017-12190)

It was discovered that the key management subsystem in the Linux kernel did
not properly restrict key reads on negatively instantiated keys. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2017-12192)

It was discovered that an integer overflow existed in the sysfs interface
for the QLogic 24xx+ series SCSI driver in the Linux kernel. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2017-14051)

Otto Ebeling discovered that the memory manager in the Linux kernel did not
properly check the effective UID in some situations. A local attacker could
use this to expose sensitive information. (CVE-2017-14140)

It was discovered that the ATI Radeon framebuffer driver in the Linux
kernel did not properly initialize a data structure returned to user space.
A local attacker could use this to expose sensitive information (kernel
memory). (CVE-2017-14156)

ChunYu Wang discovered that the iSCSI transport implementation in the Linux
kernel did not properly validate data structures. A local attacker could
use this to cause a denial of service (system crash). (CVE-2017-14489)

James Patrick-Evans discovered a race condition in the LEGO USB Infrared
Tower driver in the Linux kernel. A physically proximate attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-15102)

ChunYu Wang discovered that a use-after-free vulnerability existed in the
SCTP protocol implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code, (CVE-2017-15115)

It was discovered that the key management subsystem in the Linux kernel did
not properly handle NULL payloads with non-zero length values. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2017-15274)

It was discovered that the Bluebooth Network Encapsulation Protocol (BNEP)
implementation in the Linux kernel did not validate the type of socket
passed in the BNEPCONNADD ioctl(). A local attacker with the CAP_NET_ADMIN
privilege could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-15868)

Andrey Konovalov discovered a use-after-free vulnerability in the USB
serial console driver in the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2017-16525)

It was discovered that the netfilter passive OS fingerprinting (xt_osf)
module did not properly perform access control checks. A local attacker
could improperly modify the system-wide OS fingerprint list.
(CVE-2017-17450)

It was discovered that the HMAC implementation did not validate the state
of the underlying cryptographic hash algorithm. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-17806)

Denys Fedoryshchenko discovered a use-after-free vulnerability in the
netfilter xt_TCPMSS filter of the Linux kernel. A remote attacker could use
this to cause a denial of service (system crash). (CVE-2017-18017)

Gareth Evans discovered that the shm IPC subsystem in the Linux kernel did
not properly restrict mapping page zero. A local privileged attacker could
use this to execute arbitrary code. (CVE-2017-5669)

It was discovered that an integer overflow vulnerability existing in the
IPv6 implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (infinite loop). (CVE-2017-7542)

Tommi Rantala and Brad Spengler discovered that the memory manager in the
Linux kernel did not properly enforce the CONFIG_STRICT_DEVMEM protection
mechanism. A local attacker with access to /dev/mem could use this to
expose sensitive information or possibly execute arbitrary code.
(CVE-2017-7889)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-8824)

Mohamed Ghannam discovered a null pointer dereference in the RDS (Reliable
Datagram Sockets) protocol implementation of the Linux kernel. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2018-5333)

范龙飞 discovered that a race condition existed in loop block device
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-5344)

USN-3524-1 mitigated CVE-2017-5754 (Meltdown) for the amd64
architecture in Ubuntu 14.04 LTS. This update provides the
corresponding mitigations for the ppc64el architecture. Original
advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.
(CVE-2017-5754)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 14.04

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

Related notices

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading