DataRescue IDA Pro Remote Debugger Server Authentication Bypass
iDefense Security Advisory 03.23.07
Mar 23, 2007
DataRescue Inc.'s IDA Pro is a disassembler and debugger for Windows, Linux,
or Macintosh. It supports multiple binary formats as well as many processor
architectures. For more information about IDA Pro, visit the vendor's
at the following URL.
Remote exploitation of a password bypass vulnerability in DataRescue Inc.'s
IDA Pro Remote Debugger Server allows attackers to execute arbitrary code
under the context of the user who is running the remote debugger server.
Since version 4.8, IDA Pro supports remote debugging of x86/AMD64 Windows PE
applications and Linux ELF applications over TCP/IP networks. The IDA
distribution ships with a debugger server for Windows, Linux, and (as of
version 5.1) MacOS X.
The IDA Pro debugger server allows a user to specify a password for
authentication by supplying the -P parameter. The vulnerability specifically
exists in the the processor_request() function. This function is used
initial packet exchange as well as subsequent requests. This function
ensure that the remote user has authenticated prior to calling the
perform_request() function. As such, attacker requests sent prior to
authenticating would be processed normally.
Exploitation of the described vulnerability allows attackers to execute
arbitrary code under the context of the user who starts the remote debugger
It should be noted that the debugger server does not run as a service.
be manually executed. Additionally, the remote debugger server can only
one debugger session at a time. As such, this vulnerability can not be
exploited while the debugger server is in use.
iDefense has confirmed the existence of this vulnerability in the remote
debugger server for Windows and Linux from IDA Pro versions 5.0 and 5.1. It
is suspected that the MacOS X version and earlier versions are also
In order to reduce exposure to this vulnerability, the remote debugger
should not be left running when it is not in use.
Additionally, access to the port used by the remote debugger server could be
blocked with the use of a firewall.
VI. VENDOR RESPONSE
"Since this vulnerability is in the open part of IDA, we provide the
source code for the modified files."
DataRescue Inc. has made the fix available at the following URL.
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
03/20/2007 Initial vendor notification
03/20/2007 Initial vendor response
03/23/2007 Coordinated public disclosure
This vulnerability was reported to iDefense by enhalos.
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X. LEGAL NOTICES
Copyright =A9 2007 iDefense, Inc.
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Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
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There are no warranties with regard to this information. Neither the
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