Date: Mon, 19 Nov 2012 22:12:04 -0500 (EST) From: "Steven M. Christey" <coley@...-smtp.mitre.org> To: oss-security@...ts.openwall.com cc: Jan Lieskovsky <jlieskov@...hat.com>, "Steven M. Christey" <coley@...-smtp.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 For my own clarification - where does this long file name come from? If it's only provided on the command line, then I don't see how this would be a vulnerability, since the person executing mcrypt would only be attacking themselves. (CVE-2012-4409 is still OK since one wouldn't expect code execution when decrypting the contents of a file.) Thanks, Steve On Thu, 18 Oct 2012, Kurt Seifried wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 10/18/2012 07:50 AM, Jan Lieskovsky wrote: >> Hello Kurt, Steve, vendors, >> >> Attila Bogar reported a stack-based buffer overflow >> in the way MCrypt, a crypt() package and crypt(1) command >> replacement, used to encrypt / decrypt files with overly >> long names (longer than 128 bytes). A remote attacker >> could provide a specially-crafted file that, when processed >> by the mcrypt too, would lead to mcrypt executable crash [*]. >> >> A different vulnerability than CVE-2012-4409: >>  https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-4409 >> >> Note: Using Red Hat bugzilla record for CVE-2012-4409 since >> particular Mitre record is not described yet. >> >> References: >>  https://bugzilla.redhat.com/show_bug.cgi?id=867790 >> >> Patch proposed by Attila: >>  https://bugzilla.redhat.com/show_bug.cgi?id=867790#c0 >> >> Reproducer: >> To reproduce let mcrypt encrypt / decrypt file with name >> longer ~128 bytes. >> >> Could you allocate a CVE id for this? >> >> Thank you && Regards, Jan. >> -- >> Jan iankko Lieskovsky / Red Hat Security Response Team >> >> [*] FORTIFY_SOURCE protection mechanism would mitigate this >> deficiency to result into crash only. But on systems, without >> FORTIFY_SOURCE protection being applied, the impact might be >> higher. >> >> P.S.: I am not sure about relation of this issue to the issue >> Raphael Geissert reported previously: >>  http://www.openwall.com/lists/oss-security/2012/10/02/1 >> >> so CC-in him too, he to clarify if  == , or if >> they are yet different issues. Raphael, please clarify. >> Thanks, Jan. >> > > Please use CVE-2012-4527 for this issue. > > - -- > Kurt Seifried Red Hat Security Response Team (SRT) > PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.12 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://www.enigmail.net/ > > iQIcBAEBAgAGBQJQgE3DAAoJEBYNRVNeJnmTP1UP/j6LR69c0tuOKaN/wWTtLu7J > yfbsXmQLd7PfrqSl748bzLdGEVjvAZ/r2GvyPbNRv/Wl1zV6LGRkuOmuq7XRC5JB > VGLsQlg6g8NZ7n1SGh+oDWSQ16CihzE25G0lf/qO4xCs6aKfcSfpYEM1rQANp9O4 > vZB7bWOZj1iBmUrrHsh/bnANAbaLdV/JN4747i0fMFB/aFhILvRFJk284FUFjQgY > oE6Gqs5DIwFBZYyLYEj/2sqcvxw1vBMLE48QrIuVpJIColK7hU3fGIEBJRJUPVXn > JkR3F0egpkkm7+p72OxayTt9YgY69GJCouY+xfY4Si5yZvwMaHvTy341TgT6H5F7 > 76SYtmoTGKWKa/L9TUAYQkxhzPkUP6syu3HyVvuPRdLEL7Bv3DX+LQAX5/a0QnwB > B7SftW+yoH4/h/+wRCrza4cViuiF1pKjD+OVEXQUWH/Ih9OF0I9mZIbiequV4ZRB > odHVOuyNwPdxYDtC63joBaPGO6ldL9t2HsJSbn5mmT27HIlrUiSkkxaRGfeYJaDE > t2iUMiPqzP0VgmxwgrYgYdNgOrv+4T1p7QBWJ7w9Auy0fDMwyFo+ZxPo2xkfkoPh > CcAev7nv5S53nUae/zfl15KLr/ta2j7pIaPgoHwZtlfaXy4u3Qsfoy1kKD6FGmEg > 9RTi0YQOif4AYghYtb28 > =TH3z > -----END PGP SIGNATURE----- >
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