USN-3377-1: Linux kernel vulnerabilities
3 August 2017
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-raspi2 - Linux kernel for Raspberry Pi 2
Details
Fan Wu and Shixiong Zhao discovered a race condition between inotify events
and vfs rename operations in the Linux kernel. An unprivileged local
attacker could use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2017-7533)
It was discovered that the Linux kernel did not properly restrict
RLIMIT_STACK size. A local attacker could use this in conjunction with
another vulnerability to possibly execute arbitrary code.
(CVE-2017-1000365)
李强 discovered that the Virtio GPU driver in the Linux kernel did not
properly free memory in some situations. A local attacker could use this to
cause a denial of service (memory consumption). (CVE-2017-10810)
石磊 discovered that the RxRPC Kerberos 5 ticket handling code in the
Linux kernel did not properly verify metadata. A remote attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-7482)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 17.04
-
linux-image-generic
-
4.10.0.30.31
-
linux-image-4.10.0-30-lowlatency
-
4.10.0-30.34
-
linux-image-generic-lpae
-
4.10.0.30.31
-
linux-image-4.10.0-30-generic
-
4.10.0-30.34
-
linux-image-4.10.0-30-generic-lpae
-
4.10.0-30.34
-
linux-image-4.10.0-1013-raspi2
-
4.10.0-1013.16
-
linux-image-lowlatency
-
4.10.0.30.31
-
linux-image-raspi2
-
4.10.0.1013.15
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.