bugtraq - Re: Netsprint Toolbar 1.1 arbitrary remote code vulnerability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date: Tue, 17 Apr 2007 17:32:28 +0200 (CEST)
From: Michal Zalewski <lcamtuf@...ne.ids.pl>
To: Michal Bucko <michal.bucko@...k.pl>
Cc: bugtraq@...urityfocus.com
Subject: Re: Netsprint Toolbar 1.1 arbitrary remote code vulnerability

On Tue, 17 Apr 2007, Michal Bucko wrote:

> Function of a prototype isChecked (char*) (in toolbar.dll) is vulnerable
> to buffer overrun. Arbitrary code execution might be possible.The
> problem occurs when
>
> 767B49 MOV ECX,[EAX+140]
>
> data is being copied into the buffer of an insufficient size.

Your advisory contains virtually no technical information that could be
used to confirm the problem - but assuming Intel notation, the above MOV
seems to be inconsistent with the description given.

This operations loads dword from memory into a register; if this is where
the application crashes, it's more likely indicative of a NULL pointer bug
(if EAX is 0), or some memory allocation mishap.

Cheers,
/mz