[USN-4565-1] OpenConnect vulnerability

Paulo Flabiano Smorigo pfsmorigo at canonical.com
Tue Oct 6 13:43:12 UTC 2020

Ubuntu Security Notice USN-4565-1
October 05, 2020

openconnect vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS


OpenConnect could be made to crash if it received specially crafted

Software Description:
- openconnect: An SSL VPN client


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 LTS:
  libopenconnect5                 7.08-3ubuntu0.18.04.2
  openconnect                     7.08-3ubuntu0.18.04.2

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


Package Information:
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