CVE-2000-0024: Medium severity Microsoft Internet Information Server vulnerability
IIS does not properly canonicalize URLs, potentially allowing remote attackers to bypass access restrictions in third-party software via escape characters, aka the "Escape Character Parsing" vulnerability.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
Restrict network access to Microsoft Commerce Server, Microsoft Site Server Commerce, and IIS management or administrative interfaces to trusted IP addresses using perimeter firewalls or network ACLs to reduce exposure to URL-based bypass attempts.
- Compensating control
Deploy a Web Application Firewall (WAF) or reverse proxy in front of IIS that canonicalizes/normalizes URLs and blocks requests containing escape characters or suspicious percent-encoded sequences that could be used to bypass access restrictions.
- Operational
Monitor IIS and application logs for requests containing escape characters or unusual encoded sequences, create alerts for suspicious patterns, and investigate potential attempts to bypass access controls.
- Operational
Apply official Microsoft patches or upgrades for IIS, Microsoft Commerce Server, and Microsoft Site Server Commerce as soon as vendor fixes are released; subscribe to Microsoft security advisories for notification of fixes.
Event History
Frequently Asked Questions
What is the severity of CVE-2000-0024?
CVE-2000-0024 has a high severity rating due to the potential for remote attackers to bypass access restrictions.
How do I fix CVE-2000-0024?
To fix CVE-2000-0024, apply the latest security patches provided by Microsoft for affected versions.
Which software is affected by CVE-2000-0024?
CVE-2000-0024 affects Microsoft Internet Information Server 4.0 and Microsoft Site Server 3.0.
What is the risk of not addressing CVE-2000-0024?
Not addressing CVE-2000-0024 can lead to unauthorized access to restricted resources, potentially compromising sensitive data.
Is CVE-2000-0024 still relevant today?
While CVE-2000-0024 is a historical vulnerability, it remains relevant for systems still running affected versions of the software.