Ubuntu Security Notice 4058-1 - It was discovered that Bash incorrectly handled the restricted shell. An attacker could possibly use this issue to escape restrictions and execute any command.
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Ubuntu Security Notice USN-4058-1
July 15, 2019
bash vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary:
A system hardening measure could be bypassed.
Software Description:
- bash: GNU Bourne Again SHell
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 16.04 LTS:
bash 4.3-14ubuntu1.4
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4058-1
CVE-2019-9924
Package Information:
https://launchpad.net/ubuntu/+source/bash/4.3-14ubuntu1.4