CVE-2010-1885
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 71.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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."
- CVSS 2.0
- 9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
- EPSS
- 71.24% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- microsoft/windows 2003 server · microsoft/windows server 2003 · microsoft/windows xp
- Source
- secure@microsoft.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.