Ubuntu 3946-1: rssh vulnerabilities

    Date11 Apr 2019
    CategoryUbuntu
    4187
    Posted ByLinuxSecurity Advisories
    rssh could be made to run arbitrary commands if it received specially crafted input.
    ==========================================================================
    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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