Auth bypass in Microsoft Internet Information Services
CVE-2009-1535
The WebDAV extension in Microsoft Internet Information Services (IIS) 5.1 and 6.0 allows remote attackers to bypass URI-based protection mechanisms, and list folders or read, create, or modify files, via a %c0%af (Unicode / character) at an arbitrary position in the URI, as demonstrated by inserting %c0%af into a "/protected/" initial pathname component to bypass the password protection on the protected\ folder, aka "IIS 5.1 and 6.0 WebDAV Authentication Bypass Vulnerability," a different vulnerability than CVE-2009-1122.
Vulnerability class: Broken Authentication
EPSS: 0.981 (99.9th percentile) — read the EPSS interpretation.
Affected products
- Microsoft Internet_information_services — versions 5.1, 6.0
- Microsoft Windows_server_2003
- Microsoft Windows_xp
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (signature, x_refsource_OVAL, Third Party Advisory, vdb-entry)
- secure@microsoft.com (x_refsource_MS, vendor-advisory, Patch, Vendor Advisory)
- secure@microsoft.com (x_refsource_MISC, Broken Link)
- secure@microsoft.com (Third Party Advisory, x_refsource_MISC)
- secure@microsoft.com (mailing-list, x_refsource_FULLDISC, Broken Link)
- secure@microsoft.com (mailing-list, x_refsource_FULLDISC, Broken Link)
- secure@microsoft.com (Third Party Advisory, x_refsource_MISC)
- secure@microsoft.com (US Government Resource, Third Party Advisory, x_refsource_CERT, third-party-advisory)
- secure@microsoft.com (x_refsource_MISC, Broken Link)
- secure@microsoft.com (mailing-list, x_refsource_FULLDISC, Broken Link)
Frequently asked questions
- What is CVE-2009-1535?
- CVE-2009-1535 is a vulnerability in Microsoft Internet Information Services, classified under Improper Authentication. Published 2009-06-10.
- Is CVE-2009-1535 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.