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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In August 2005 at Black Hat Las Vegas, Michael Lynn
delivered his infamous presentation entitled "Cisco IOS Shellcode and
Exploitation Techniques". For the first time ever, remote exploitation of
Cisco IOS was publicly demonstrated using shellcode that spawned a connect-back
or "reverse" shell. His shellcode was never released outside Cisco.<o:p></o:p></span></font></p>
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font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Over the last few months IRM have been researching the
security of Cisco IOS which has resulted in the discovery of a series of
serious security vulnerabilities (including three new stack overflows).
Advisories and associated IOS patches will be released over the coming months,
starting with the first - a co-ordinated release between IRM and Cisco at 12:00
EST today (<a href="http://www.irmplc.com/index.php/107-Advisories">http://www.irmplc.com/index.php/107-Advisories</a>)<o:p></o:p></span></font></p>
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font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>During the research, three shellcode payloads for IOS
exploits were developed - a "reverse" shell, a password-protected
"bind" shell and another "bind" shell that is achieved
using only two 1-byte memory overwrites. IRM have produced videos demonstrating
each of these payloads in action within a development environment. They can be
viewed here:<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><a
href="http://www.irmplc.com/index.php/153-Embedded-Systems-Security">http://www.irmplc.com/index.php/153-Embedded-Systems-Security</a><o:p></o:p></span></font></p>
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