Advisory Published

USN-4006-1: Linux kernel vulnerability

First published: Tue Jun 04 2019(Updated: )

Federico Manuel Bento discovered that the Linux kernel did not properly apply Address Space Layout Randomization (ASLR) in some situations for setuid a.out binaries. A local attacker could use this to improve the chances of exploiting an existing vulnerability in a setuid a.out binary. As a hardening measure, this update disables a.out support.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-gke<4.18.0.1012.12
4.18.0.1012.12
=18.10
All of
ubuntu/linux-image-4.18.0-21-lowlatency<4.18.0-21.22
4.18.0-21.22
=18.10
All of
ubuntu/linux-image-4.18.0-21-snapdragon<4.18.0-21.22
4.18.0-21.22
=18.10
All of
ubuntu/linux-image-4.18.0-1017-aws<4.18.0-1017.19
4.18.0-1017.19
=18.10
All of
ubuntu/linux-image-generic<4.18.0.21.22
4.18.0.21.22
=18.10
All of
ubuntu/linux-image-gcp<4.18.0.1012.12
4.18.0.1012.12
=18.10
All of
ubuntu/linux-image-4.18.0-1012-gcp<4.18.0-1012.13
4.18.0-1012.13
=18.10
All of
ubuntu/linux-image-4.18.0-1013-kvm<4.18.0-1013.13
4.18.0-1013.13
=18.10
All of
ubuntu/linux-image-4.18.0-21-generic<4.18.0-21.22
4.18.0-21.22
=18.10
All of
ubuntu/linux-image-4.18.0-1015-raspi2<4.18.0-1015.17
4.18.0-1015.17
=18.10
All of
ubuntu/linux-image-generic-lpae<4.18.0.21.22
4.18.0.21.22
=18.10
All of
ubuntu/linux-image-snapdragon<4.18.0.21.22
4.18.0.21.22
=18.10
All of
ubuntu/linux-image-aws<4.18.0.1017.17
4.18.0.1017.17
=18.10
All of
ubuntu/linux-image-kvm<4.18.0.1013.13
4.18.0.1013.13
=18.10
All of
ubuntu/linux-image-4.18.0-21-generic-lpae<4.18.0-21.22
4.18.0-21.22
=18.10
All of
ubuntu/linux-image-lowlatency<4.18.0.21.22
4.18.0.21.22
=18.10
All of
ubuntu/linux-image-raspi2<4.18.0.1015.12
4.18.0.1015.12
=18.10

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is USN-4006-1.

  • What is the severity of USN-4006-1?

    The severity of USN-4006-1 is not mentioned in the provided information.

  • How does the Linux kernel vulnerability (USN-4006-1) affect Ubuntu 18.10?

    The Linux kernel vulnerability (USN-4006-1) affects Ubuntu 18.10 and can be exploited by a local attacker to improve the chances of exploiting an existing vulnerability in a setuid a.out binary.

  • Is there a fix available for USN-4006-1?

    Yes, a fix is available for USN-4006-1. It is recommended to update to version 4.18.0.1012.12 of the linux-image-gke package for Ubuntu 18.10.

  • Where can I find more information about USN-4006-1?

    You can find more information about USN-4006-1 at the following references: [USN-4008-1](https://ubuntu.com/security/notices/USN-4008-1) and [USN-4007-1](https://ubuntu.com/security/notices/USN-4007-1).

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