KDE Applications IDN Spoofing Security Issue - Advisories

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KDE Applications IDN Spoofing Security Issue

Secunia Advisory:	SA14162
Release Date:	2005-02-07
Last Update:	2005-03-16

Critical:	Moderately critical
Impact:	Spoofing
Where:	From remote
Solution Status:	Vendor Patch

Software:	KDE 3.x Konqueror 3.x

CVE reference:	CVE-2005-0237 (Secunia mirror)

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Description: Eric Johanson has reported a security issue in Konqueror, which can be exploited by a malicious web site to spoof the URL displayed in the address bar and status bar. The problem is caused due to an unintended result of the IDN (International Domain Name) implementation, which allows using international characters in domain names. This can be exploited by registering domain names with certain international characters that resembles other commonly used characters, thereby causing the user to believe they are on a trusted site. Secunia has constructed a test, which can be used to check if your browser is affected by this issue: http://secunia.com/multiple_browsers_idn_spoofing_test/ The security issue affects all versions in the KDE 3.2.x and KDE 3.3.x series. NOTE: This is reportedly a KDE-wide issue and does therefore also affect other KDE applications displaying URLs. Solution: Upgrade to KDE 3.4 or apply patch. Patch for KDE 3.2.x: ftp://ftp.kde.org/pub/kde/security_patches/post-3.2.3-kdelibs-idn.patch 611bad3cb9ae46ac35b907c7321da7aa Patch for KDE 3.3.x: ftp://ftp.kde.org/pub/kde/security_patches/post-3.3.2-kdelibs-idn.patch c87754dbbaca4cdfeb26626a908fab5f Provided and/or discovered by: Originally described by: Evgeniy Gabrilovich and Alex Gontmakher Reported by: Eric Johanson Changelog: 2005-02-09: Added KDE as affected. 2005-02-10: Added CVE reference. 2005-03-16: Added information provided by vendor. Updated "Solution" section. Original Advisory: KDE: http://www.kde.org/info/security/advisory-20050316-2.txt The Shmoo Group: http://www.shmoo.com/idn/homograph.txt Other References: KDE bug report: http://bugs.kde.org/show_bug.cgi?id=98788 The Homograph Attack: http://www.cs.technion.ac.il/~gabr/papers/homograph.html ICANN paper on IDN Permissible Code Point Problems: http://www.icann.org/committees/idn/idn-codepoint-paper.htm



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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