[ASA-202004-16] openvpn: denial of service
rgacogne at archlinux.org
Sun Apr 19 12:38:06 UTC 2020
Arch Linux Security Advisory ASA-202004-16
Date : 2020-04-17
CVE-ID : CVE-2020-11810
Package : openvpn
Type : denial of service
Remote : Yes
Link : https://security.archlinux.org/AVG-1135
The package openvpn before version 2.4.9-1 is vulnerable to denial of
Upgrade to 2.4.9-1.
# pacman -Syu "openvpn>=2.4.9-1"
The problem has been fixed upstream in version 2.4.9.
A security issue has been found in OpenVPN before 2.4.9, where a 'peer-
id' check is not performed correctly during a small amount of time
after a connection has been established. A rogue client sending a data
channel packet during that time, from a different source address and
with the same 'peer-id', would cause the client data to float to that
new address, effectively sopping the VPN traffic of the first,
A remote attacker might be able to cause the legitimate VPN session of
another client to stall, by sending a crafted packet right at the
beginning of the VPN session.
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