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             AUSCERT External Security Bulletin Redistribution

                     USN-4289-1: Squid vulnerabilities
                             21 February 2020


        AusCERT Security Bulletin Summary

Product:           Squid
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
                   Access Confidential Data        -- Remote/Unauthenticated
                   Unauthorised Access             -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-8517 CVE-2020-8450 CVE-2020-8449

Original Bulletin: 

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running Squid check for an updated version of the software for their
         operating system.

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USN-4289-1: Squid vulnerabilities
20 February 2020

squid, squid3 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS


Several security issues were fixed in Squid.

Software Description

  o squid - Web proxy cache server
  o squid3 - Web proxy cache server


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

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

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

In general, a standard system update will make all the necessary changes.


  o CVE-2019-12528
  o CVE-2020-8449
  o CVE-2020-8450
  o CVE-2020-8517

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