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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0113
                     USN-4690-1: coTURN vulnerability
                              13 January 2021

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

Product:           coTURN
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Reduced Security -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-26262  

Reference:         ESB-2021.0098

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4690-1

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USN-4690-1: coTURN vulnerability
11 January 2021

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

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

Packages

  o coturn - TURN and STUN server for VoIP

Details

It was discovered that coTURN allowed peers to connect and relay packets to
loopback addresses in the range of 127.x.x.x. A malicious user could use this
vulnerability to insert packages into the loopback interface.

Update instructions

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

Ubuntu 20.10

  o coturn - 4.5.1.3-1ubuntu0.1

Ubuntu 20.04

  o coturn - 4.5.1.1-1.1ubuntu0.20.04.2

Ubuntu 18.04

  o coturn - 4.5.0.7-1ubuntu2.18.04.3

Ubuntu 16.04

  o coturn - 4.5.0.3-1ubuntu0.4

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

References

  o CVE-2020-26262

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