Ubuntu 4289-1: Squid vulnerabilities

    Date20 Feb 2020
    705
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in Squid.
    ==========================================================================
    Ubuntu Security Notice USN-4289-1
    February 20, 2020
    
    squid, squid3 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in Squid.
    
    Software Description:
    - squid: Web proxy cache server
    - squid3: Web proxy cache server
    
    Details:
    
    Jeriko One discovered that Squid incorrectly handled memory when connected
    to an FTP server. A remote attacker could possibly use this issue to obtain
    sensitive information from Squid memory. (CVE-2019-12528)
    
    Regis Leroy discovered that Squid incorrectly handled certain HTTP
    requests. A remote attacker could possibly use this issue to access server
    resources prohibited by earlier security filters. (CVE-2020-8449)
    
    Guido Vranken discovered that Squid incorrectly handled certain buffer
    operations when acting as a reverse proxy. A remote attacker could use
    this issue to cause Squid to crash, resulting in a denial of service, or
    possibly execute arbitrary code. (CVE-2020-8450)
    
    Aaron Costello discovered that Squid incorrectly handled certain NTLM
    authentication credentials. A remote attacker could possibly use this issue
    to cause Squid to crash, resulting in a denial of service. (CVE-2020-8517)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      squid                           4.8-1ubuntu2.2
    
    Ubuntu 18.04 LTS:
      squid                           3.5.27-1ubuntu1.5
    
    Ubuntu 16.04 LTS:
      squid                           3.5.12-1ubuntu7.10
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4289-1
      CVE-2019-12528, CVE-2020-8449, CVE-2020-8450, CVE-2020-8517
    
    Package Information:
      https://launchpad.net/ubuntu/+source/squid/4.8-1ubuntu2.2
      https://launchpad.net/ubuntu/+source/squid3/3.5.27-1ubuntu1.5
      https://launchpad.net/ubuntu/+source/squid3/3.5.12-1ubuntu7.10
    
    

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