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USN-4001-2: libseccomp vulnerability

USN-4001-2: libseccomp vulnerability

libseccomp vulnerability

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

Summary

libseccomp could allow unintended access to system calls.

Software Description

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

Source: USN-4001-2: libseccomp vulnerability

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