Full Disclosure mailing list archives
Re: openssh remote exploit
From: Darren Reed <avalon () caligula anu edu au>
Date: Wed, 17 Sep 2003 02:41:16 +1000 (Australia/ACT)
In some mail from auto64746 () hushmail com, sie said:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Look closer. buffer->alloc += len + 32768; if (buffer->alloc > 0xa00000) fatal("buffer_append_space: alloc %u not supported",buffer->alloc); buffer->buf = xrealloc(buffer->buf, buffer->alloc); goto restart; i do not have belief of giving the codepath but we must take buffer_free and make overflow by '\0'. this is not exploit of 2.4.x as malloc never return null. unless malloc w00d00.
Ah, I see what you mean. I was looking at the code assuming all the functions called worked perfectly and that fatal() did nothing fancy. In reading it through, I took an attitude of not looking at any other files or functions to see what they did as the pointer didn't mention those and who knows where it might have ended or how much time it would have taken ? Remember, this is OpenSSH - the world's most perfect software. And I'm sure this will manage to be another remote exploit that the OpenBSD team will find a way to not count on their front page. Cheers, Darren _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- openssh remote exploit auto64746 (Sep 15)
- Re: openssh remote exploit Darren Reed (Sep 15)
- Re: openssh remote exploit Timo Sirainen (Sep 16)
- Re: openssh remote exploit Adam Dyga (Sep 17)
- <Possible follow-ups>
- Re: openssh remote exploit auto64746 (Sep 16)
- Re: openssh remote exploit Diode Trnasistor (Sep 16)
- Re: openssh remote exploit Darren Reed (Sep 16)
- RE: openssh remote exploit Edward W. Ray (Sep 16)
- Re: openssh remote exploit Darren Reed (Sep 16)
- Re: openssh remote exploit Mike Griffin (Sep 16)
- Re: openssh remote exploit KF (Sep 16)
- Re: openssh remote exploit Henning Brauer (Sep 16)
- Re: openssh remote exploit Peter Busser (Sep 19)
- Re: openssh remote exploit petard (Sep 16)
- Re: openssh remote exploit Darren Reed (Sep 16)
- Re: openssh remote exploit Blue Boar (Sep 16)
- Re: openssh remote exploit Richard Johnson (Sep 17)