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    Ubuntu 4508-1: StoreBackup vulnerability

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    StoreBackup could be made to stop executing or generate a race condition if it received a lock file in the default location.
    ==========================================================================
    Ubuntu Security Notice USN-4508-1
    September 16, 2020
    
    storebackup vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.04 LTS
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    StoreBackup could be made to stop executing or generate a race condition
    if it received a lock file in the default location.
    
    Software Description:
    - storebackup: fancy compressing managing checksumming deduplicating
    hard-linkin
    
    Details:
    
    It was discovered that StoreBackup did not properly manage lock files. A
    local attacker could use this issue to cause a denial of service or
    escalate privileges and run arbitrary code. (CVE-2020-7040)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 20.04 LTS:
      storebackup                     3.2.1-1+deb8u1build0.20.04.1
    
    Ubuntu 18.04 LTS:
      storebackup                     3.2.1-1+deb8u1build0.18.04.1
    
    Ubuntu 16.04 LTS:
      storebackup                     3.2.1-1+deb8u1build0.16.04.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4508-1
      CVE-2020-7040
    
    Package Information:
    
    https://launchpad.net/ubuntu/+source/storebackup/3.2.1-1+deb8u1build0.20.04.1
    
    https://launchpad.net/ubuntu/+source/storebackup/3.2.1-1+deb8u1build0.18.04.1
    
    https://launchpad.net/ubuntu/+source/storebackup/3.2.1-1+deb8u1build0.16.04.1
    
    

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