ESB-2020.3697 – [Ubuntu] Netty: Multiple vulnerabilities

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3697
                     USN-4600-2: Netty vulnerabilities
                              28 October 2020

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

Product:           Netty
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service        -- Remote/Unauthenticated
                   Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-11612 CVE-2019-20445 CVE-2019-20444

Reference:         ESB-2020.3655
                   ESB-2020.3243
                   ESB-2020.3049

Original Bulletin: 
   https://usn.ubuntu.com/4600-2/

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USN-4600-2: Netty vulnerabilities
27 October 2020

netty could be made to crash or run programs if it received
specially crafted network traffic.
Releases

  o Ubuntu 18.04 LTS

Packages

  o netty - None

Details

USN-4600-1 fixed multiple vunerabilities in Netty 3.9. This update provides
the corresponding fixes for CVE-2019-20444, CVE-2019-20445 for Netty.

Also it was discovered that Netty allow for unbounded memory allocation. A
remote attacker could send a large stream to the Netty server causing it to
crash (denial of service). (CVE-2020-11612)

Original advisory details:

It was discovered that Netty had HTTP request smuggling vulnerabilities. A
remote attacker could used it to extract sensitive information.
(CVE-2019-16869,
CVE-2019-20444, CVE-2019-20445, CVE-2020-7238)

Update instructions

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

Ubuntu 18.04

  o libnetty-java - 1:4.1.7-4ubuntu0.1

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

References

  o CVE-2019-20444
  o CVE-2020-11612
  o CVE-2019-20445

Related notices

  o USN-4600-1 : netty-3.9, libnetty-3.9-java
  o USN-4532-1 : netty-3.9, libnetty-3.9-java

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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