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cURL/libcURL NTLM and Kerberos Authentication Buffer Overflows
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Secunia Advisory:
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SA14364
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Release Date:
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2005-02-22
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Popularity:
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8,723 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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Partial Fix
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| Software: | cURL 7.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2005-0490
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Description:
infamous41md has reported two vulnerabilities in cURL/libcURL, which can be exploited by malicious people to compromise a user's system.
1) A boundary error in the "Curl_input_ntlm()" function during NTLM authentication can be exploited to cause a stack-based buffer overflow by returning an overly long response when a user is tricked into connecting to a malicious server.
Successful exploitation allows execution of arbitrary code.
2) A boundary error in the "Curl_krb_kauth()" function during Kerberos authentication can be exploited to cause a stack-based buffer overflow by returning an overly long response when a user is tricked into connecting to a malicious server.
Successful exploitation allows execution of arbitrary code.
The vulnerabilities have been reported in version 7.12.1. Other versions may also be affected.
Solution:
1) The vendor has issued a fix for the NTLM vulnerability:
http://cool.haxx.se/cvs.cgi/curl/lib/http_ntlm.c.diff?r1=1.36&r2=1.37
2) Recompile cURL without Kerberos support.
Provided and/or discovered by:
infamous41md
Original Advisory:
iDEFENSE:
http://www.idefense.com/application/poi/display?id=202&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=203&type=vulnerabilities
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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