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Message-Id: <20080219231033.2108f539.aluigi@autistici.org> Date: Tue, 19 Feb 2008 23:10:33 +0100 From: Luigi Auriemma <aluigi@...istici.org> To: bugtraq@...urityfocus.com, news@...uriteam.com, full-disclosure@...ts.grok.org.uk, vuln@...unia.com, packet@...ketstormsecurity.org Subject: NULL pointer crash in freeSSHd 1.20 ####################################################################### Luigi Auriemma Application: freeSSHd http://www.freesshd.com Note: is possible that the problem affects also wodSSHServer anyway this has not been tested Versions: <= 1.2.0 Platforms: Windows Bug: NULL pointer crash Exploitation: remote Date: 17 Feb 2008 Author: Luigi Auriemma e-mail: aluigi@...istici.org web: aluigi.org ####################################################################### 1) Introduction 2) Bug 3) The Code 4) Fix ####################################################################### =============== 1) Introduction =============== freeSSHd is a free SSH server for Windows. ####################################################################### ====== 2) Bug ====== The server can be crashed through a NULL pointer access simply sending a SSH2_MSG_NEWKEYS packet as first command. ####################################################################### =========== 3) The Code =========== http://aluigi.org/poc/freesshdnull.zip ####################################################################### ====== 4) Fix ====== No fix ####################################################################### --- Luigi Auriemma http://aluigi.org _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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