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Ubuntu 17.10 USN-3657-1 Critical: Kernel Issues Impacting Raspberry Pi 2

ubuntu
Calendar Grey May 22, 2018
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Ubuntu 17.10 has released important security updates targeting significant Linux kernel vulnerabilities affecting the Raspberry Pi 2.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- 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 ca...

Read the Full Advisory

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

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

https://ubuntu.com/security/notices/USN-3657-1

CVE-2017-17449, CVE-2017-17975, CVE-2017-18203, CVE-2017-18208,

CVE-2018-8822

Severity
critical
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May 22, 2018

Package Information

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