Ubuntu Security Notice (C) 2004-2016 Canonical, Inc. / NASL script (C) 2006-2016 Tenable Network Security, Inc.
The remote Ubuntu host is missing a security-related patch.
Liam Helmer discovered an input validation flaw in sudo. When the
standard shell 'bash' starts up, it searches the environment for
variables with a value beginning with '()'. For each of these
variables a function with the same name is created, with the function
body filled in from the environment variable's value.
A malicious user with sudo access to a shell script that uses bash can
use this feature to substitute arbitrary commands for any
non-fully-qualified programs called from the script. Therefore this
flaw can lead to privilege escalation.
Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.
Update the affected sudo package.
Risk factor :
Family: Ubuntu Local Security Checks
Nessus Plugin ID: 20643 ()
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