Newfangled cookie attack steals/poisons website creds

A security researcher has discovered a weakness in a core browser protocol that compromises the security of Google, Facebook, and other websites by allowing an attacker to tamper with the cookies they set. The weakness stems from RFC 2965, which dictates that browsers must allow subdomains (think www.google.com) to set and …

[bell]

Surely some of this is easily avoided

While tampering with session cookies is definitely an issue, although not an insurmountable one, the javascript injection is really avoidable. Memo to expedia: Cookie content is NOT trusted data.

Paris, 'cos even she's not as wide open as reports suggest.

[Pascal Monett]

Just one question

Is Firefox concerned by this exploit or not ?

[Anonymous Coward]

Am I missing something here?

Cookie data is effectively user input. Any web app that doesn't sanitise user inputs gets what it deserves. Even if some student's project is insecure, that's no excuse for fuck ups elsewhere.

[Frank Bitterlich]

Stop the press...

Whoa, you mean that messy security on subdomain.mydomain.com can affect mydomain.com, too? Now that's a _whole_ new concept!

(For those from Beteigeuze, now's the right time to switch on your irony detector.)

[Stevie]

Bah!

So my navel-lint blog is compromised?

Noooooooooooooooooooooooooooooooooooooo!