Ubuntu 4011-2: Jinja2 vulnerabilities

    Date06 Jun 2019
    CategoryUbuntu
    25
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in Jinja2.
    ==========================================================================
    Ubuntu Security Notice USN-4011-2
    June 06, 2019
    
    jinja2 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    - Ubuntu 12.04 ESM
    
    Summary:
    
    Several security issues were fixed in Jinja2.
    
    Software Description:
    - jinja2: small but fast and easy to use stand-alone template engine
    
    Details:
    
    USN-4011-1 fixed several vulnerabilities in Jinja2. This update
    provides the corresponding update for Ubuntu 12.04 ESM  and Ubuntu
    14.04 ESM.
    
    Original advisory details:
    
     Olivier Dony discovered that Jinja incorrectly handled str.format. An
     attacker could possibly use this issue to escape the sandbox.
     (CVE-2016-10745)
    
     Brian Welch discovered that Jinja incorrectly handled str.format_map.
     An attacker could possibly use this issue to escape the sandbox.
     (CVE-2019-10906)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      python-jinja2                   2.7.2-2ubuntu0.1~esm1
      python3-jinja2                  2.7.2-2ubuntu0.1~esm1
    
    Ubuntu 12.04 ESM:
      python-jinja2                   2.6-1ubuntu0.2
      python3-jinja2                  2.6-1ubuntu0.2
    
    In general, a standard system update will make all the necessary
    changes.
    
    References:
      https://usn.ubuntu.com/4011-2
      https://usn.ubuntu.com/4011-1
      CVE-2016-10745, CVE-2019-10906
    
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