Should I upgrade to macOS Sequoia now?

Christian on Little Snitch, Security — September 20, 2024

The short answer is: We don’t recommend upgrading now because there are several bugs related to networking and firewalls in the 15.0 release. We expect most of them to be fixed in 15.1. If you have already upgraded or if you want to upgrade for…

Warning: DNS encryption in Little Snitch 6.1 may occasionally fail

Norbert on Little Snitch, Security — September 17, 2024

UPDATE: Spoke too soon… The problem discussed here turned out to be specific to Little Snitch 6.1 and not a general issue in macOS. It has already been fixed in Little Snitch 6.1.1. See the end of the article for details. DNS Encryption 101 When…

Three-way handshake bypassing Little Snitch

Christian on Little Snitch, Security — June 6, 2023

There has been some discussion recently about the bypassing of Little Snitch by the first datagram of a three-way TCP handshake. The facts: When a deny-rule for a domain is set in Little Snitch, and a TCP connection is made to that domain, a TCP SYN…

The Story Behind CVE-2019-13013

Christian on Mac, Security, Little Snitch, Developer — August 26, 2019

This blog post targets fellow software developers. It’s a story of how it could happen that we shipped a version of Little Snitch with a serious vulnerability and, more importantly, what we can learn from it. It all began with a security…

Archive