[NEWS] Cross Site Scripting in Yacy

From: SecuriTeam (support_at_securiteam.com)
Date: 12/27/04

  • Next message: SecuriTeam: "[UNIX] PHProxy Cross Site Scripting" 
    To: list@securiteam.com
Date: 27 Dec 2004 10:11:31 +0200

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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      Cross Site Scripting in Yacy
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.yacy.net/yacy/> YACY is "a Java Freeware P2P-Based Search
    Engine with Caching HTTP Proxy". Due to improper input filtering, YACY is
    vulnerable to Cross Site Scripting attacks.

    DETAILS

    Vulnerable Systems:
     * Yacy version 0.31

    Immune Systems:
     * Yacy version 0.32

    Some of the input field are not filtered by the server so the input will
    appear in the returned page. This allows a malicious attacker to run
    JavaScript or other scripting language on a client's browser.

    Proof of Concept:
    To test the vulnerability, try for example:
    http://[host]:8080/index.html?urlmaskfilter=<script>alert(document.cookie)</script>
    http://[host]:8080/Wiki.html?page=<script>alert(document.cookie)</script>

    Vendor Status:
    The vendor has released version 0.32 which address this issue.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:fdonato@autistici.org>
    Donato Ferrante.

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