Home/CVE/The (1) CertGetCertificateChain, (2) CertVerifyCertificateChainPolicy, and (3) WinVerifyTrust APIs within the CryptoAPI
CVE

CVE-2002-0862

The (1) CertGetCertificateChain, (2) CertVerifyCertificateChainPolicy, and (3) WinVerifyTrust APIs within the CryptoAPI

The (1) CertGetCertificateChain, (2) CertVerifyCertificateChainPolicy, and (3) WinVerifyTrust APIs within the CryptoAPI for Microsoft products including Microsoft Windows 98 through XP, Office for Mac, Internet Explorer for Mac, and Outlook Express for Mac, do not properly verify the Basic Constraints of intermediate CA-signed X.509 certificates, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack for SSL sessions, as originally reported for Internet Explorer and IIS.

MEDIUM · CVSS 6.8 EPSS 0.17339
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules17 YARA rules0
⬡

Weakness Classification

CWE-295Improper Certificate Validation
▤

Affected Products & Versions

9
microsoft windows 2000all versions
microsoft windows 98all versions
microsoft windows 98seall versions
microsoft windows meall versions
microsoft windows ntall versions
microsoft windows xpall versions
microsoft internet explorerall versions
microsoft officeall versions
⚠

Public Exploits & PoCs

1
remoteMicrosoft Internet Explorer 5/6 / Konqueror 2.2.2/3.0 / Weblogic Server 5/6/7 - Invalid X.509 Certificate Chainverified
◈

Sigma Hunt Rules

17
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumInternet Explorer DisableFirstRunCustomize Enabled
productmediumInternet Explorer Autorun Keys Modification
producthighSuspicious Microsoft Office Child Process - MacOS
producthighCode Executed Via Office Add-in XLL File
producthighPotential Persistence Via Microsoft Office Add-In
producthighPotential Persistence Via Microsoft Office Startup Folder
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Published to NVD04 Oct 2002 · 04:00 AM
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://marc.info/?l=bugtraq&m=102866120821995&w=2Mailing List
http://marc.info/?l=bugtraq&m=102918200405308&w=2Mailing List
http://marc.info/?l=bugtraq&m=102976967730450&w=2Mailing List
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-050PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/9776Third Party AdvisoryVDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1056Broken Link
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