1. Ubuntu Security Notices
  2. USN-4001-2

USN-4001-2: libseccomp vulnerability

Publication date

30 May 2019

Overview

libseccomp could allow unintended access to system calls.

Releases

Packages

  • libseccomp - library for working with the Linux seccomp filter

Details

USN-4001-1 fixed a vulnerability in libseccomp. This update provides the
corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Jann Horn discovered that libseccomp did not correctly generate 64-bit
syscall argument comparisons with arithmetic operators (LT, GT, LE, GE).
An attacker could use this to bypass intended access restrictions for
argument-filtered system calls.

USN-4001-1 fixed a vulnerability in libseccomp. This update provides the
corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Jann Horn discovered that libseccomp did not correctly generate 64-bit
syscall argument comparisons with arithmetic operators (LT, GT, LE, GE).
An attacker could use this to bypass intended access restrictions for
argument-filtered system calls.

Update instructions

This update uses a new upstream release which includes additional bug fixes. In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
14.04 trusty libseccomp2 –  2.4.1-0ubuntu0.14.04.2

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References

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