USN-3620-1: Linux kernel vulnerabilities
linux vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
- linux – Linux kernel
Details
It was discovered that the netlink 802.11 configuration interface in the
Linux kernel did not properly validate some attributes passed from
userspace. 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-2017-11089)
It was discovered that a buffer overflow existed in the ioctl handling code
in the ISDN 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-2017-12762)
It was discovered that the netfilter component of the Linux did not
properly restrict access to the connection tracking helpers list. A local
attacker could use this to bypass intended access restrictions.
(CVE-2017-17448)
Dmitry Vyukov discovered that the KVM implementation in the Linux kernel
contained an out-of-bounds read when handling memory-mapped I/O. A local
attacker could use this to expose sensitive information. (CVE-2017-17741)
It was discovered that the Salsa20 encryption algorithm implementations in
the Linux kernel did not properly handle zero-length inputs. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2017-17805)
It was discovered that the keyring implementation in the Linux kernel did
not properly check permissions when a key request was performed on a
task’s’ default keyring. A local attacker could use this to add keys to
unauthorized keyrings. (CVE-2017-17807)
It was discovered that the Broadcom NetXtremeII ethernet driver in the
Linux kernel did not properly validate Generic Segment Offload (GSO) packet
sizes. An attacker could use this to cause a denial of service (interface
unavailability). (CVE-2018-1000026)
It was discovered that the Reliable Datagram Socket (RDS) implementation in
the Linux kernel contained an out-of-bounds write during RDMA page
allocation. An attacker could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2018-5332)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 14.04 LTS
- linux-image-3.13.0-144-generic – 3.13.0-144.193
- linux-image-3.13.0-144-generic-lpae – 3.13.0-144.193
- linux-image-3.13.0-144-lowlatency – 3.13.0-144.193
- linux-image-3.13.0-144-powerpc-e500 – 3.13.0-144.193
- linux-image-3.13.0-144-powerpc-e500mc – 3.13.0-144.193
- linux-image-3.13.0-144-powerpc-smp – 3.13.0-144.193
- linux-image-3.13.0-144-powerpc64-emb – 3.13.0-144.193
- linux-image-3.13.0-144-powerpc64-smp – 3.13.0-144.193
- linux-image-generic – 3.13.0.144.154
- linux-image-generic-lpae – 3.13.0.144.154
- linux-image-lowlatency – 3.13.0.144.154
- linux-image-powerpc-e500 – 3.13.0.144.154
- linux-image-powerpc-e500mc – 3.13.0.144.154
- linux-image-powerpc-smp – 3.13.0.144.154
- linux-image-powerpc64-emb – 3.13.0.144.154
- linux-image-powerpc64-smp – 3.13.0.144.154
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.
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