openvpn -- server-side denial-of-service vulnerability with tls-crypt-v2

Gert Doering reports: OpenVPN servers between 2.6.1 and 2.6.13 using --tls-crypt-v2 can be made to abort with an ASSERT message by sending a particular combination of authenticated and malformed packets. To trigger the bug, a valid tls-crypt-v2 client key is needed, or network observation of a...

ntp: off-path denial of service on authenticated broadcast mode

It was found that when NTP was configured in broadcast mode, a remote attacker could broadcast packets with bad authentication to all clients. The clients, upon receiving the malformed packets, would break the association with the broadcast server, causing them to become out of sync over a longer...

NTP Authentication Bypass Vulnerability

NTP is a network protocol that synchronizes the clocks of two computers by exchanging packets. NTP has a security vulnerability that allows a remote attacker to send NTP packets authenticated with a data password, insert malicious time data, and cause the system clock to be set incorrectly...