Vulnerability identifier: #VU3048

Vulnerability risk: Medium

CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2010-0817

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Windows SharePoint Services
Web applications / Other software
Microsoft Office InfoPath
Client/Desktop applications / Office applications
Microsoft SharePoint Server
Server applications / Application servers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability exists due to insufficient sanitization of user-supplied input data passed to Help.aspx script. A remote attacker can trick the victim into following a specially crafted link and execute arbitrary HTML and script code in victim’s browser in context of vulnerable SharePoint website.

Successful exploitation may allow an attacker to conduct phishing and drive-by-download attacks.

Note: this vulnerability is being publicly exploited.

Mitigation
Install update from vendor's website:

Microsoft Windows SharePoint Services 3.0 Service Pack 1 and Microsoft Windows SharePoint Services 3.0 Service Pack 2 (32-bit versions)
https://www.microsoft.com/downloads/details.aspx?familyid=3841ceda-d0af-4e5e-8a1a-7dd954850783

Microsoft Windows SharePoint Services 3.0 Service Pack 1 and Microsoft Windows SharePoint Services 3.0 Service Pack 2 (64-bit versions)
https://www.microsoft.com/downloads/details.aspx?familyid=94bc76d4-78e4-4bda-8922-36c3a9d3854f

Vulnerable software versions

Microsoft Windows SharePoint Services: 3.0 SP1

Microsoft Office InfoPath: 2003 - 2007

Microsoft SharePoint Server: 2007

---

External links
http://technet.microsoft.com/en-us/library/security/ms10-039.aspx
http://www.htbridge.com/advisory/HTB22350

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.