Title: W3Perl Web Statistics Header Manipulation Vulnerability
Severity: HIGH
Description:
W3Perl is freely available, open-source web statistics software. W3Perl generates statistics for website usage based on log files and outputs them to HTML. Users can select various levels of detail. W3Perl will run on most Linux and Unix variants as well as Microsoft Windows NT/2000 operating systems.
W3Perl does not sufficiently sanitize the data is processes from log files. As a result, it may be possible for an attacker to inject maliciously constructed data which will end up being displayed on the website running W3Perl.
Attackers can exploit this situation by crafting a HTTP header which contains malicious script code. The maliciously crafted request will be logged by the webserver and the web statistics software will process/format the information to be displayed. The output of the web statistics software will be displayed on the website running W3Perl. This results in a cross-site scripting attack. This issue may also be exploited to falsify log entries.
HTTP header manipulation attacks against the web statistics software may allow the attacker to hijack sessions by stealing cookie-based authentication credentials from users.
Affected Products:
- W3Perl W3Perl 2.81.0
- W3Perl W3Perl 2.82.0
- W3Perl W3Perl 2.83.0
- W3Perl W3Perl 2.84.0
- W3Perl W3Perl 2.85.0
References:
- W3Perl: W3Perl Product Page
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