Ubuntu 4077-1: tmpreaper vulnerability

    Date 29 Jul 2019
    1516
    Posted By LinuxSecurity Advisories
    tmpreaper could be made to overwrite files as the administrator.
    ==========================================================================
    Ubuntu Security Notice USN-4077-1
    July 29, 2019
    
    tmpreaper vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    tmpreaper could be made to overwrite files as the administrator.
    
    Software Description:
    - tmpreaper: cleans up files in directories based on their age
    
    Details:
    
    It was discovered that tmpreaper incorrectly handled certain mount operations. A
    local attacker could possibly use this issue to create arbitrary files, leading
    to privilege escalation.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      tmpreaper                       1.6.13+nmu1+deb9u1build0.18.04.1
    
    Ubuntu 16.04 LTS:
      tmpreaper                       1.6.13+nmu1+deb9u1build0.16.04.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4077-1
      CVE-2019-3461
    
    Package Information:
      
    https://launchpad.net/ubuntu/+source/tmpreaper/1.6.13+nmu1+deb9u1build0.18.04.1
      
    https://launchpad.net/ubuntu/+source/tmpreaper/1.6.13+nmu1+deb9u1build0.16.04.1
    

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