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Apple Safari and Konqueror Embedded Common Name Verification Vulnerability
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Secunia Advisory:
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SA8756
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Release Date:
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2003-05-09
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Last Update:
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2003-06-18
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Popularity:
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18,004 views
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Critical:
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Moderately critical
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Impact:
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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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| OS: | Apple Macintosh OS X
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| Software: | KDE 2.x
Konqueror Embedded
Safari 1.x
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| CVE reference: | CVE-2003-0355
CVE-2003-0370
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Description:
Apple Safari and Konqueror Embedded fails to validate the Common Name of a SSL certificate. This makes it possible to spoof SSL sites, so that users can't trust the authenticity of a SSL website.
SSL serves two main purposes; one is to ensure the authenticity of the server, which you are communicating with, the other is to provide encrypted communication. The authenticity part is completely broken when the Common Name isn't verified, since the user can't know if he is communicating with the host in the address bar.
Exploitation of this requires that a malicious person is able to perform DNS spoofing (eg. see CERT vulnerability note in "Other References" section).
Internet Explorer and Netscape suffered similar vulnerabilities a few years ago.
Solution:
KDE advises users of KDE 2.2.2 to upgrade to either KDE 3.0.5a or KDE 3.1.2. A patch for version 2.2.2 has also been made available:
ftp://ftp.kde.org/pub/kde/security_patches/post-2.2.2-kdelibs-kssl-2.diff
ftp://ftp.kde.org/pub/kde/security_patches/post-2.2.2-kdelibs-kio-2.diff
Update Konqueror/Embedded to the snapshot of May 16, 2003 or later:
http://devel-home.kde.org/~hausmann/s...ror-embedded-snapshot-20030516.tar.gz
Apple has released a new version of Safari which isn't vulnerable.
http://www.apple.com/safari/
Provided and/or discovered by:
Simson L. Garfinkel and Jesse Burns
Changelog:
2003-06-02: KDE releases advisory and updated versions.
2003-06-10: Apple has released new version of safari.
Original Advisory:
http://www.kde.org/info/security/advisory-20030602-1.txt
Other References:
DNS Spoofing:
http://www.kb.cert.org/vuls/id/457875
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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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