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GnuTLS X.509 CN and SAN Fields NUL Character Spoofing Vulnerability
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Secunia Advisory:
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SA36266
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Release Date:
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2009-08-11
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Last Update:
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2009-08-13
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Popularity:
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1,484 views
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Critical:
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Moderately critical
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Impact:
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Hijacking
Spoofing
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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: | GnuTLS 2.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
A vulnerability has been reported in GnuTLS, which can be exploited by malicious people to conduct spoofing attacks.
The vulnerability is caused due to an error when parsing X.509 CN and SAN fields containing NUL ('\0') characters. This can be exploited to e.g. stop GnuTLS from printing the entire CN and SAN fields and conduct Man-in-the-Middle (MitM) attacks on server-authenticated TLS sessions via specially crafted X.509 certificates.
The vulnerability is reported in versions prior to 2.8.2.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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