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[USN-3294-2] Bash vulnerability

Posted on 01 August 2017
Ubuntu Security

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Ubuntu Security Notice USN-3294-2
August 01, 2017

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

- Ubuntu 12.04 ESM

Summary:

A security issues were fixed in Bash.

Software Description:
- bash: GNU Bourne Again SHell

Details:

USN-3294-1 fixed a vulnerability in Bash. This update provides the
corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

=C2=A0It was discovered that Bash incorrectly handled the SHELLOPTS and PS4
=C2=A0environment variables. A local attacker could use this issue to
=C2=A0execute arbitrary code with root privileges. (CVE-2016-7543)

Update instructions:

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

Ubuntu 12.04 ESM:
=C2=A0 bash=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A04.2-2ubuntu2.7

In general, a standard system update will make all the necessary
changes.

References:
=C2=A0 https://www.ubuntu.com/usn/usn-3294-2
=C2=A0 https://www.ubuntu.com/usn/usn-3294-1
=C2=A0 CVE-2016-7543

 

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