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Vulnerability Details : CVE-2010-1885 (1 public exploit)

The MPC::HexToNum function in helpctr.exe in Microsoft Windows Help and Support Center in Windows XP and Windows Server 2003 does not properly handle malformed escape sequences, which allows remote attackers to bypass the trusted documents whitelist (fromHCP option) and execute arbitrary commands via a crafted hcp:// URL, aka "Help Center URL Validation Vulnerability."
Publish Date : 2010-06-15 Last Update Date : 2010-09-17
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- CVSS Scores & Vulnerability Types

CVSS Score
9.3
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeBypass a restriction or similar
CWE ID 78

- Related OVAL Definitions

Title Definition Id Class Family
Help Center URL Validation Vulnerability oval:org.mitre.oval:def:11733 windows
MS10-042: Vulnerability in Help and Support Center Could Allow Remote Code Execution (2229593) oval:gov.nist.fdcc.patch:def:11677 windows
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2010-1885

# Product Type Vendor Product Version Update Edition Language
1 OS Microsoft Windows 2003 Server SP2 Version Details Vulnerabilities
2 OS Microsoft Windows 2003 Server SP2 Itanium Version Details Vulnerabilities
3 OS Microsoft Windows Server 2003 SP2 X64 Version Details Vulnerabilities
4 OS Microsoft Windows Xp - SP2 X64 Version Details Vulnerabilities
5 OS Microsoft Windows Xp SP3 Version Details Vulnerabilities
6 OS Microsoft Windows Xp SP2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft Windows 2003 Server 2
Microsoft Windows Server 2003 1
Microsoft Windows Xp 3

- References For CVE-2010-1885

http://blogs.technet.com/b/msrc/archive/2010/06/10/windows-help-vulnerability-disclosure.aspx
Exploit! http://www.exploit-db.com/exploits/13808
EXPLOIT-DB 13808 Microsoft Windows Help Centre Handles Malformed Escape Sequences Incorrectly Author:Tavis Ormandy Release Date:2010-06-10 (windows) remote
http://secunia.com/advisories/40076
SECUNIA 40076
http://blogs.technet.com/b/srd/archive/2010/06/10/help-and-support-center-vulnerability-full-disclosure-posting.aspx CONFIRM
http://www.securitytracker.com/id?1024084
SECTRACK 1024084
http://technet.microsoft.com/en-us/security/advisory/2219475
Microsoft Advisory http://www.microsoft.com/technet/security/advisory/2219475.mspx Microsoft Security Advisory (2219475): Vulnerability in Windows Help and Support Center Could Allow Remote Code Execution - Version: 2.0 Revision Note: V2.0 (July 13, 2010): Advisory updated to reflect publication of security bulletin. Summary: Microsoft has completed the investigation into a public report of this vulnerability. We have issued MS10-042 to address this issue. For more information about this issue, including download links for an available security update, please review MS10-042. The vulnerability addressed is the Help Center URL Validation Vulnerability - CVE-2010-1885.Release Date:2010-07-13
http://technet.microsoft.com/en-us/security/bulletin/ms10-042
Microsoft Security Bulletin MS10-042 Vulnerability in Help and SupportCenter Could Allow Remote Code Execution (2229593) This security update resolves a publicly disclosed vulnerability in the Windows Help and Support Center feature that is delivered with supported editions of Windows XP and Windows Server 2003. This vulnerability could allow remote code execution if a user views a specially crafted Web page using a Web browser or clicks a specially crafted link in an e-mail message. The vulnerability cannot be exploited automatically through e-mail. For an attack to be successful, a user must click a link listed within an e-mail message.
http://www.securityfocus.com/archive/1/archive/1/511774/100/0/threaded
BUGTRAQ 20100609 Microsoft Windows Help Centre Handles Malformed Escape Sequences Incorrectly
http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0197.html
FULLDISC 20100609 Microsoft Windows Help Centre Handles Malformed Escape Sequences Incorrectly
http://www.securityfocus.com/archive/1/archive/1/511783/100/0/threaded
BUGTRAQ 20100610 Re: Microsoft Windows Help Centre Handles Malformed Escape Sequences Incorrectly
http://xforce.iss.net/xforce/xfdb/59267
XF ms-win-helpctr-command-execution(59267)
http://www.vupen.com/english/advisories/2010/1417
VUPEN ADV-2010-1417
http://www.us-cert.gov/cas/techalerts/TA10-194A.html
CERT TA10-194A
http://www.securityfocus.com/bid/40725
BID 40725 Microsoft Windows Help And Support Center Trusted Document Whitelist Bypass Vulnerability Release Date:2010-07-15
http://www.kb.cert.org/vuls/id/578319
CERT-VN VU#578319

- Metasploit Modules Related To CVE-2010-1885

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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