Description
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."
Metrics
CVSS 2.0 9.3/10
AV:N/AC:M/Au:N/C:C/I:C/A:CWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0197.htmlExploit
- http://blogs.technet.com/b/msrc/archive/2010/06/10/windows-help-vulnerability-disclosure.aspx
- http://blogs.technet.com/b/srd/archive/2010/06/10/help-and-support-center-vulnerability-full-disclosure-posting.aspxVendor Advisory
- http://secunia.com/advisories/40076Vendor Advisory
- http://www.exploit-db.com/exploits/13808
- http://www.kb.cert.org/vuls/id/578319US Government Resource
- http://www.microsoft.com/technet/security/advisory/2219475.mspxVendor Advisory
- http://www.securityfocus.com/archive/1/511774/100/0/threaded
- http://www.securityfocus.com/archive/1/511783/100/0/threaded
- http://www.securityfocus.com/bid/40725Exploit
- http://www.securitytracker.com/id?1024084
- http://www.us-cert.gov/cas/techalerts/TA10-194A.htmlUS Government Resource
- http://www.vupen.com/english/advisories/2010/1417Vendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-042
- https://exchange.xforce.ibmcloud.com/vulnerabilities/59267
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11733
- http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0197.htmlExploit
- http://blogs.technet.com/b/msrc/archive/2010/06/10/windows-help-vulnerability-disclosure.aspx
- http://blogs.technet.com/b/srd/archive/2010/06/10/help-and-support-center-vulnerability-full-disclosure-posting.aspxVendor Advisory
- http://secunia.com/advisories/40076Vendor Advisory
- http://www.exploit-db.com/exploits/13808
- http://www.kb.cert.org/vuls/id/578319US Government Resource
- http://www.microsoft.com/technet/security/advisory/2219475.mspxVendor Advisory
- http://www.securityfocus.com/archive/1/511774/100/0/threaded
- http://www.securityfocus.com/archive/1/511783/100/0/threaded
- http://www.securityfocus.com/bid/40725Exploit
- http://www.securitytracker.com/id?1024084
- http://www.us-cert.gov/cas/techalerts/TA10-194A.htmlUS Government Resource
- http://www.vupen.com/english/advisories/2010/1417Vendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-042
- https://exchange.xforce.ibmcloud.com/vulnerabilities/59267
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11733
Timeline
- Published
- Jun 15, 2010
- Last modified
- Jun 16, 2026
- NVD status
- Modified