fusetalk CSS (autherror.cfm)

2007-06-29 / 2007-06-30
Credit: Ivan Almuina
Risk: Low
Local: No
Remote: Yes

CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

Hello everyone, After trying to report a SQL bug (autherror.cfm) to FuseTalk, and seeing them providing patches to customers (dropping new fixed .cfm files in a private place reserved to customers) without giving proper credits and without reporting them publicly (we were following the Full Disclosure Policy v2.0), we decided to release the advisories without contacting them concerning the other bugs we found. Here is the second one: ------------------------ Advisory: FuseTalk affected by multiple Cross Site Scripting bugs Product: FuseTalk Basic/Standard/Enterprise ColdFusion version Version: unknown, the vendor fixes bugs without changing version number Risk: Medium Reported on: April 25, 2007 Vendor: FuseTalk Impact: execution of script code in the victim's browser window Product Overview ------------------------ With an easy-to-use, intuitive administration system, extensive customization capabilities and a rich feature set, FuseTalk is a pleasure to use for both administrators and forum members. Full RDBMS support, high performance and full linear scalability allow FuseTalk to meet your demands.Over 1,000 customers use FuseTalk to deliver the benefits of collaborative online communities, including VCampus, Rockwell, Seagate Software, Macromedia, Hasbro, U.S. Air Force, AT&T, Citicorp, McCormick and Company, Adobe, eBay, AnandTech, NASA, Bloomberg, the U.S. Dept. of Energy, VISA, etc. Summary ------------------------ FuseTalk is vulnerable to multiple Cross Site Scripting bugs. Technical Details ------------------------ The problem lies in the /forum/include/error/autherror.cfm script, the variables FTVAR_LINKP and FTVAR_URLP are not sanitized. Proof of Concept (PoC) ------------------------ http://[srv]/forum/include/error/autherror.cfm?errorcode=1 &FTVAR_LINKP=%22%3E%3C/a%3E%3Cscript%3Ealert(document.cookie) %3C/script%3E%3Ca%20href=%22 http://[srv]/forum/include/error/autherror.cfm?errorcode=1 &FTVAR_URLP=%22%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E Credit ------------------------ Discovered by Ivan Almuina of Fastcom Technology SA. Contact ------------------------ almuina at domainname (following domain) fastcom-technology.com Disclaimer ------------------------ The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are no warranties, implied or express, with regard to this information. In no event shall the author be liable for any direct or indirect damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk. --- More fusetalk advisories to come, -- Ivan Almuina Fastcom Technology S.A. Phone: +41 21 619 06 70 Fax: +41 21 619 06 71 Internet: http://www.fastcom-technology.com/

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