Multiple vulnerabilities have been reported in e-Pares, which can be exploited by malicious people to conduct cross-site scripting, cross-site request forgery, and session fixation attacks.

1) Certain unspecified input is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

This vulnerability is reported in version V01 and L01.

2) The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to e.g. modify unspecified booking facilities data.

This vulnerability is reported in version V01, L01, L03, L10, L20, L30, and L40.

3) The vulnerability is caused due to an error in the handling of sessions and can be exploited to hijack another user's session by tricking the user into logging in after following a specially crafted link.

This vulnerability is reported in version V01, L01, L03, L10, L20, and L30.

Solution
Reportedly a patch has been released. Contact the vendor for further information.

Provided and/or discovered by
Reported by Mr. Yamaya Akira of Mitsui Bussan Secure Directions, Inc. via JVN.

Changelog
Further details available to Secunia VIM customers

Original Advisory
JVN:
http://jvn.jp/jp/JVN36925871/index.html
http://jvn.jp/jp/JVN58439007/index.html
http://jvn.jp/jp/JVN82465391/index.html
http://jvndb.jvn.jp/en/contents/2010/JVNDB-2010-000021.html
http://jvndb.jvn.jp/en/contents/2010/JVNDB-2010-000022.html
http://jvndb.jvn.jp/en/contents/2010/JVNDB-2010-000023.html

Deep Links
Links available to Secunia VIM customers