Exploit Title: Newtelligence dasBlog Open Redirect Vulnerability
Product: dasBlog
Vendor: Newtelligence
Vulnerable Versions: 2.3 (2.3.9074.18820) 2.2 (2.2.8279.16125)
2.1(2.1.8102.813)
Tested Version: 2.3 (2.3.9074.18820)
Advisory Publication: OCT 15, 2014
Latest Update: OCT 15, 2014
Vulnerability Type: Open Redirect [CWE-601]
CVE Reference: CVE-2014-7292
Risk Level: Low
CVSSv2 Base Score: 2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
Credit: Wang Jing [Mathematics, Nanyang Technological University, Singapore]




Advisory Details:

Newtelligence dasBlog ct.ashx is vulnerable to Open Redirect attacks.


dasBlog supports a feature called Click-Through which basically tracks all
links clicked inside your blog posts. It's a nice feature that allows the
blogger to stay informed what kind of content readers like. If
Click-Through is turned on, all URLs inside blog entries will be replaced
with <URL to your blog>/ct.ashx?id=<Blog entry ID>&url=<URL-encoded
original URL> which of course breaks WebSnapr previews.


Web.config code:
<add verb="*" path="ct.ashx"
type="newtelligence.DasBlog.Web.Services.ClickThroughHandler,
newtelligence.DasBlog.Web.Services"/>


(1) The vulnerability occurs at "ct.ashx?" page, with "&url" parameter.



Solutions:
2014-10-15 Public disclosure with self-written patch.




References:
http://www.tetraph.com/blog/cves/cve-2014-7292-newtelligence-dasblog-open-redirect-vulnerability/
https://searchcode.com/codesearch/view/8710666/
https://www.microsoft.com/web/gallery/dasblog.aspx
https://dasblog.codeplex.com/releases/view/86033
http://cwe.mitre.org
http://cve.mitre.org/