========================================================================== Ubuntu Security Notice USN-3946-1 April 11, 2019
rssh vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: rssh could be made to run arbitrary commands if it received specially crafted input. Software Description: - rssh: Restricted shell allowing scp, sftp, cvs, svn, rsync or rdist Details: It was discovered that rssh incorrectly handled certain command-line arguments and environment variables. An authenticated user could bypass rssh's command restrictions, allowing an attacker to run arbitrary commands. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10: rssh 2.3.4-8ubuntu0.2 Ubuntu 18.04 LTS: rssh 2.3.4-7ubuntu0.1 Ubuntu 16.04 LTS: rssh 2.3.4-4+deb8u2ubuntu0.16.04.2 Ubuntu 14.04 LTS: rssh 2.3.4-4+deb8u2ubuntu0.14.04.2 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/usn/usn-3946-1 CVE-2019-1000018, CVE-2019-3463, CVE-2019-3464 Package Information: https://launchpad.net/ubuntu/+source/rssh/2.3.4-8ubuntu0.2 https://launchpad.net/ubuntu/+source/rssh/2.3.4-7ubuntu0.1 https://launchpad.net/ubuntu/+source/rssh/2.3.4-4+deb8u2ubuntu0.16.04.2 https://launchpad.net/ubuntu/+source/rssh/2.3.4-4+deb8u2ubuntu0.14.04.2
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