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⚔ Commemorated today: The Poisoned Love Letter (2000)Saint 21Nails, of the Twenty-One Nails
Patron of mail servers, code that ages without anyone rereading it, and people who count nails one by one.
Life
On 4 May 2021 the Qualys research team revealed 21Nails: twenty-one vulnerabilities in the Exim mail server, eleven local and ten remote. Chained together, some let an unauthenticated attacker run code as root, and many dated back to 2004, the start of the project's Git history. Exim was then among the most widespread mail servers on the internet, with millions of exposed instances.
Prayer
O Saint 21Nails, who drove twenty-one nails into the world's mail, let our SMTP daemons be updated before anyone counts their flaws. Amen.
How to celebrate
Celebrated by updating Exim to at least version 4.94.2 and, now and then, rereading code written seventeen years earlier.
One nail drives out another, but twenty-one drive out the postman.