Ubuntu 4213-1: Squid vulnerabilities

    Date 04 Dec 2019
    424
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in Squid.
    ==========================================================================
    Ubuntu Security Notice USN-4213-1
    December 04, 2019
    
    squid, squid3 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    - Ubuntu 19.04
    - 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 and Kristoffer Danielsson discovered that Squid incorrectly
    handled certain URN requests. A remote attacker could possibly use this
    issue to bypass access checks and access restricted servers. This issue was
    only addressed in Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-12523)
    
    Jeriko One discovered that Squid incorrectly handed URN responses. A remote
    attacker could use this issue to cause Squid to crash, resulting in a
    denial of service, or possibly execute arbitrary code. (CVE-2019-12526)
    
    Alex Rousskov discovered that Squid incorrectly handled certain strings. A
    remote attacker could possibly use this issue to cause Squid to crash,
    resulting in a denial of service. This issue only affected Ubuntu 19.04.
    (CVE-2019-12854)
    
    Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
    handled certain input. A remote attacker could use this issue to cause
    Squid to crash, resulting in a denial of service, or possibly execute
    arbitrary code. This issue was only addressed in Ubuntu 19.04 and Ubuntu
    19.10. (CVE-2019-18676)
    
    Kristoffer Danielsson discovered that Squid incorrectly handled certain
    messages. This issue could result in traffic being redirected to origins
    it should not be delivered to. (CVE-2019-18677)
    
    Régis Leroy discovered that Squid incorrectly handled certain HTTP
    request headers. A remote attacker could use this to smuggle HTTP requests
    and corrupt caches with arbitrary content. (CVE-2019-18678)
    
    David Fifield discovered that Squid incorrectly handled HTTP Digest
    Authentication. A remote attacker could possibly use this issue to obtain
    pointer contents and bypass ASLR protections. (CVE-2019-18679)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      squid                           4.8-1ubuntu2.1
    
    Ubuntu 19.04:
      squid                           4.4-1ubuntu2.3
    
    Ubuntu 18.04 LTS:
      squid3                          3.5.27-1ubuntu1.4
    
    Ubuntu 16.04 LTS:
      squid3                          3.5.12-1ubuntu7.9
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4213-1
      CVE-2019-12523, CVE-2019-12526, CVE-2019-12854, CVE-2019-18676,
      CVE-2019-18677, CVE-2019-18678, CVE-2019-18679
    
    Package Information:
      https://launchpad.net/ubuntu/+source/squid/4.8-1ubuntu2.1
      https://launchpad.net/ubuntu/+source/squid/4.4-1ubuntu2.3
      https://launchpad.net/ubuntu/+source/squid3/3.5.27-1ubuntu1.4
      https://launchpad.net/ubuntu/+source/squid3/3.5.12-1ubuntu7.9
    
    

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