==========================================================================
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
Summary:
OpenConnect could be made to crash if it received specially crafted
input.
Software Description:
– 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 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.
References:
https://usn.ubuntu.com/4565-1
CVE-2019-16239
Package Information:
https://launchpad.net/ubuntu/+source/openconnect/7.08-3ubuntu0.18.04.2
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