Date: Thu, 22 Nov 2012 10:48:05 +0100 From: Matthias Weckbecker <mweckbecker@...e.de> To: oss-security@...ts.openwall.com Cc: Jan Lieskovsky <jlieskov@...hat.com>, "Steven M. Christey" <coley@...us.mitre.org>, Attila Bogar <attila.bogar@...guamatics.com>, Raphael Geissert <geissert@...ian.org> Subject: Re: CVE Request -- mcrypt: stack-based buffer overflow by encryption / decryption of overly long file names Hi Jan, Steve, Raphael, Attila, ..., On Tuesday 20 November 2012 12:57:11 Jan Lieskovsky wrote: > Hi Steve, > > ----- Original Message ----- > [...] > [...] > > Previously considered scenario was remote user would trick the local one to > decrypt provided file (obviously the local user might not check if filename > isn't too long prior decryption). But after further review looks mcrypt > doesn't support asymmetric cryptography / keys (which I didn't know in the > moment of requesting a CVE id), only the symmetric one, which makes this > scenario impossible / unlikely. > > Considering the above, I think you are right and CVE-2012-4527 should be > probably rejected. > And what about CVE-2012-4426 then? The same applies there too, right? Reject? > Right now I can't think of a case, how this could be possible to (mis)use > for an attack. > A program that runs with higher privileges and executes mcrypt with external user-controlled input possibly? Maybe a bit far fetched, but not impossible. [...] Matthias -- Matthias Weckbecker, Senior Security Engineer, SUSE Security Team SUSE LINUX Products GmbH, Maxfeldstr. 5, D-90409 Nuernberg, Germany Tel: +49-911-74053-0; http://suse.com/ SUSE LINUX Products GmbH, GF: Jeff Hawn, HRB 16746 (AG Nuernberg)
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