Guest post by Nick Galloway, Senior Security Engineer, 20% time on Project Zero Late in 2023, while working on a 20% project with Project Zero, I found an integer overflow in the dav1d AV1 video decoder. That integer overflow leads to an out-of-bounds write to memory. Dav1d 1.4 …

By James Forshaw, Project Zero I've been spending a lot of time researching Windows authentication implementations, specifically Kerberos. In June 2022 I found an interesting issue number 2310 with the handling of RC4 encryption that allowed you to authenticate as another user if you could either interpose on the …