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Ubuntu Security Notice USN-4058-2
August 05, 2019
bash vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM
Summary:
A system hardening measure could be bypassed.
Software Description:
- bash: GNU Bourne Again SHell
Details:
USN-4058-1 fixed a vulnerability in bash. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that Bash incorrectly handled the restricted shell. An
attacker could possibly use this issue to escape restrictions and execute
any command.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 ESM:
bash 4.3-7ubuntu1.8+esm1
Ubuntu 12.04 ESM:
bash 4.2-2ubuntu2.8
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4058-2
https://usn.ubuntu.com/4058-1
CVE-2019-9924
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