Secunia Security Advisory - Hanno Boeck has discovered two vulnerabilities in Serendipity, which can be exploited by malicious users to conduct cross-site scripting and script insertion attacks.
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TITLE:
Serendipity Script Insertion and Cross-Site Scripting
SECUNIA ADVISORY ID:
SA29128
VERIFY ADVISORY:
http://secunia.com/advisories/29128/
CRITICAL:
Less critical
IMPACT:
Cross Site Scripting
WHERE:
>From remote
SOFTWARE:
Serendipity 1.x
http://secunia.com/product/12371/
DESCRIPTION:
Hanno Boeck has discovered two vulnerabilities in Serendipity, which
can be exploited by malicious users to conduct cross-site scripting
and script insertion attacks.
1) Input passed to the "realname" parameter in serendipity_admin.php
is not properly sanitised before being stored. This can be exploited
to insert arbitrary HTML and script code, which is executed in a
user's browser session in context of an affected site when the
malicious data is viewed.
2) The serendipity_admin.php script fails to completely validate the
extension of an uploaded file. This can be exploited to upload files
with the ".html" extension, which can then be used for cross-site
scripting attacks.
Successful exploitation of both vulnerabilities requires valid user
credentials.
The vulnerabilities are confirmed in version 1.2.1. Other versions
may also be affected.
SOLUTION:
Only grant access to trusted users.
Vulnerability #1 is fixed in version 1.3-beta1.
PROVIDED AND/OR DISCOVERED BY:
Hanno Boeck
ORIGINAL ADVISORY:
Serendipity:
http://blog.s9y.org/archives/191-Serendipity-1.3-beta1-released.html
Hanno Boeck:
http://int21.de/cve/CVE-2008-0124-s9y.html
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