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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3443
                   USN-4565-1: OpenConnect vulnerability
                              6 October 2020

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

Product:           OpenConnect
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-16239  

Reference:         ESB-2020.0214

Original Bulletin: 
   https://usn.ubuntu.com/4565-1/

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USN-4565-1: OpenConnect vulnerability
05 October 2020

OpenConnect could be made to crash if it received specially crafted
input.
Releases

  o Ubuntu 18.04 LTS

Packages

  o openconnect - An SSL VPN client

Details

It was discovered that OpenConnect has a buffer overflow when a malicious
server uses HTTP chunked encoding with crafted chunk sizes. An attacker
could use it to provoke a denial of service (crash).

Update instructions

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

Ubuntu 18.04

  o libopenconnect5 - 7.08-3ubuntu0.18.04.2
  o openconnect - 7.08-3ubuntu0.18.04.2

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

References

  o CVE-2019-16239

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===========================================================================
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