ESB-2020.2964 – [Ubuntu] Squid: Multiple vulnerabilities

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.2964
                     USN-4477-1: Squid vulnerabilities
                              28 August 2020

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

Product:           Squid
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service              -- Remote/Unauthenticated
                   Provide Misleading Information -- Existing Account      
                   Access Confidential Data       -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-24606 CVE-2020-15811 CVE-2020-15810

Reference:         ESB-2020.2953
                   ESB-2020.2886

Original Bulletin: 
   https://usn.ubuntu.com/4477-1/

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USN-4477-1: Squid vulnerabilities
27 August 2020

Several security issues were fixed in Squid.
Releases

  o Ubuntu 20.04 LTS

Packages

  o squid - Web proxy cache server

Details

Amit Klein discovered that Squid incorrectly validated certain data. A
remote attacker could possibly use this issue to perform an HTTP request
smuggling attack, resulting in cache poisoning. (CVE-2020-15810)

Regis Leroy discovered that Squid incorrectly validated certain data. A
remote attacker could possibly use this issue to perform an HTTP request
splitting attack, resulting in cache poisoning. (CVE-2020-15811)

Lubos Uhliarik discovered that Squid incorrectly handled certain Cache
Digest response messages sent by trusted peers. A remote attacker could
possibly use this issue to cause Squid to consume resources, resulting in a
denial of service. (CVE-2020-24606)

Update instructions

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

Ubuntu 20.04

  o squid - 4.10-1ubuntu1.2

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

References

  o CVE-2020-15810
  o CVE-2020-15811
  o CVE-2020-24606

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