Linux Security
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    Ubuntu 4633-1: PostgreSQL vulnerabilities

    Date 17 Nov 2020
    1807
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in PostgreSQL.
    ==========================================================================
    Ubuntu Security Notice USN-4633-1
    November 17, 2020
    
    postgresql-10, postgresql-12, postgresql-9.5 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.10
    - Ubuntu 20.04 LTS
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in PostgreSQL.
    
    Software Description:
    - postgresql-12: Object-relational SQL database
    - postgresql-10: Object-relational SQL database
    - postgresql-9.5: Object-relational SQL database
    
    Details:
    
    Peter Eisentraut discovered that PostgreSQL incorrectly handled connection
    security settings. Client applications could possibly be connecting with
    certain security parameters dropped, contrary to expectations.
    (CVE-2020-25694)
    
    Etienne Stalmans discovered that PostgreSQL incorrectly handled the
    security restricted operation sandbox. An authenticated remote attacker
    could possibly use this issue to execute arbitrary SQL functions as a
    superuser. (CVE-2020-25695)
    
    Nick Cleaton discovered that PostgreSQL incorrectly handled the \gset
    meta-command. A remote attacker with a compromised server could possibly
    use this issue to execute arbitrary code. (CVE-2020-25696)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 20.10:
      postgresql-12                   12.5-0ubuntu0.20.10.1
    
    Ubuntu 20.04 LTS:
      postgresql-12                   12.5-0ubuntu0.20.04.1
    
    Ubuntu 18.04 LTS:
      postgresql-10                   10.15-0ubuntu0.18.04.1
    
    Ubuntu 16.04 LTS:
      postgresql-9.5                  9.5.24-0ubuntu0.16.04.1
    
    This update uses a new upstream release, which includes additional bug
    fixes. After a standard system update you need to restart PostgreSQL to
    make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4633-1
      CVE-2020-25694, CVE-2020-25695, CVE-2020-25696
    
    Package Information:
      https://launchpad.net/ubuntu/+source/postgresql-12/12.5-0ubuntu0.20.10.1
      https://launchpad.net/ubuntu/+source/postgresql-12/12.5-0ubuntu0.20.04.1
      https://launchpad.net/ubuntu/+source/postgresql-10/10.15-0ubuntu0.18.04.1
      https://launchpad.net/ubuntu/+source/postgresql-9.5/9.5.24-0ubuntu0.16.04.1
    
    

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