USN-4001-2: libseccomp vulnerability

30 May 2019

libseccomp vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 14.04 ESM

Summary

libseccomp could allow unintended access to system calls.

Software Description

  • 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.

Update instructions

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

Ubuntu 14.04 ESM
libseccomp2 - 2.4.1-0ubuntu0.14.04.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References