“Unix Support Group” event

According to secondary sources research, a well-known, published author deployed a compiler trojan attack on the Unix login command by advertising a non-backwards-compatible feature to Bell Labs’ Unix Support Group, making its way to the login command within a month.

Impact

None as reported.

Type of compromise

Compiler backdoor, possibly compounded with human elements.

References

1. Ken Thompson Really Did Launch His “Trusting Trust” Trojan Attack in Real Life
2. Running the “Reflections on Trusting Trust” Compiler, a blog post that determined the date to be June 1975.