Gentoo Archives: gentoo-dev

From: hasufell <hasufell@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] git security (SHA-1)
Date: Mon, 15 Sep 2014 12:02:36
Message-Id: 5416D54C.8020706@gentoo.org
In Reply to: [gentoo-dev] git security (SHA-1) by hasufell
1 hasufell:
2 >
3 > * there is no known SHA-1 collision afais
4 > * calculating one isn't that hard. NSA might be able to do it in
5 > reasonable time
6 > * however, the algorithms to do that will come up with random garbage,
7 > so it's a completely different thing to hide a useful vulnerability
8 > behind a SHA-1 collision
9 >
10
11 That said... an attacker who has that much resources to calculate a
12 _random_ hash collision in reasonable time would certainly have a lot of
13 easier attack vectors than forging a _non-random_ hash collision that
14 contains actual working code (which, afaiu doesn't effectively work with
15 the current attack algorithms on SHA-1).
16
17 He could simply break into one of the ~200 developer computers. There's
18 a pretty high chance at least one of them is running windows or known
19 vulnerable versions of the kernel or other random packages.
20
21 No need to waste millions of dollars on SHA-1.

Replies

Subject Author
Re: [gentoo-dev] git security (SHA-1) Gordon Pettey <petteyg359@×××××.com>