The UMAC code generates invalid authentication tags in some (hard to reproduce) circumstances.
The issue is pretty much random, making it hard to debug.
This is a critical bug for interoperability since OpenSSH 6.4+ has a preference for UMAC-64 over other algorithms by default.
The UMAC code generates invalid authentication tags in some (hard to reproduce) circumstances. The issue is pretty much random, making it hard to debug.
This is a critical bug for interoperability since OpenSSH 6.4+ has a preference for UMAC-64 over other algorithms by default.