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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1077
                     USN-4895-1: Squid vulnerabilities
                               30 March 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Squid
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Provide Misleading Information -- Existing Account
                   Access Confidential Data       -- Existing Account
                   Unauthorised Access            -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-25097 CVE-2020-15049 

Reference:         ESB-2021.0996
                   ESB-2020.3871
                   ESB-2020.3333

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4895-1

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USN-4895-1: Squid vulnerabilities
29 March 2021

Several security issues were fixed in Squid.
Releases

  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Packages

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

Details

Alex Rousskov and Amit Klein discovered that Squid incorrectly handled
certain Content-Length headers. A remote attacker could possibly use this
issue to perform an HTTP request smuggling attack, resulting in cache
poisoning. This issue only affected Ubuntu 20.04 LTS. ( CVE-2020-15049 )

Jianjun Chen discovered that Squid incorrectly validated certain input. A
remote attacker could use this issue to perform HTTP Request Smuggling and
possibly access services forbidden by the security controls.
( CVE-2020-25097 )

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 20.10

  o squid - 4.13-1ubuntu2.1

Ubuntu 20.04

  o squid - 4.10-1ubuntu1.3

Ubuntu 18.04

  o squid - 3.5.27-1ubuntu1.10

Ubuntu 16.04

  o squid - 3.5.12-1ubuntu7.16

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

References

  o CVE-2020-25097
  o CVE-2020-15049

Related notices

  o USN-4551-1 : squid3, squid

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