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PuTTY "SSH2_MSG_DEBUG" Packet Handling Buffer Overflow Vulnerability
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Secunia Advisory:
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SA12987
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Release Date:
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2004-10-27
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Last Update:
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2004-12-07
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Popularity:
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13,420 views
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Critical:
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Moderately critical
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Impact:
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System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | PuTTY 0.x
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| CVE reference: | CVE-2004-1008
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Description:
A vulnerability has been reported in PuTTY, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a boundary error in the "ssh2_rdpkt()" function when processing of SSH2_MSG_DEBUG packets. This can be exploited to cause a buffer overflow by sending a malicious packet containing a specially crafted value in the "stringlen" parameter.
Successful exploitation allows execution of arbitrary code, but requires that a user is tricked into connecting to a malicious SSH2 server.
The vulnerability has been reported in version 0.55. Prior versions may also be affected.
Solution:
Update to version 0.56.
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
Provided and/or discovered by:
Discovered by anonymous person and reported via iDEFENSE.
Changelog:
2004-12-07: Added CVE reference.
Original Advisory:
PuTTY:
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
iDEFENSE:
http://www.idefense.com/application/poi/display?id=155&type=vulnerabilities
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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