Ubuntu 3276-3: shadow vulnerability

    Date14 Nov 2017
    CategoryUbuntu
    50
    Posted ByLinuxSecurity Advisories
    su could be made to crash or stop programs as an administrator.
    ==========================================================================
    Ubuntu Security Notice USN-3276-3
    November 14, 2017
    
    shadow vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    Summary:
    
    su could be made to crash or stop programs as an administrator.
    
    Software Description:
    - shadow: system login tools
    
    Details:
    
    USN-3276-1 and USN-3276-2 fixed vulnerabilities in shadow. This update
    provides the corresponding update for Ubuntu 12.04 ESM.
    
    Original advisory details:
    
     Sebastian Krahmer discovered integer overflows in shadow utilities.
     A local attacker could possibly cause them to crash or potentially
     gain privileges via crafted input. (CVE-2016-6252)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      login                           1:4.1.4.2+svn3283-3ubuntu5.2
      passwd                          1:4.1.4.2+svn3283-3ubuntu5.2
    
    In general, a standard system update will make all the necessary
    changes.
    
    References:
      https://www.ubuntu.com/usn/usn-3276-3
      https://www.ubuntu.com/usn/usn-3276-1
      CVE-2017-2616
    
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