CVE-2009-1535

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 2.0 •
EPSS 91.83% Top 5%
Vendor Advisory microsoft.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6029 vdb entry third party advisory signature
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020 patch vendor advisory
http://view.samurajdata.se/psview.php?id=023287d6&page=1 broken link
http://isc.sans.org/diary.html?n&storyid=6397 third party advisory
http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0135.html mailing list broken link
http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0139.html mailing list broken link
http://blog.zoller.lu/2009/05/iis-6-webdac-auth-bypass-and-data.html third party advisory
http://www.us-cert.gov/cas/techalerts/TA09-160A.html third party advisory us government resource
http://archives.neohapsis.com/archives/fulldisclosure/2009-05/att-0135/IIS_Advisory.pdf broken link
http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0144.html mailing list broken link
http://www.attrition.org/pipermail/vim/2009-June/002192.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2009-1535?
CVE-2009-1535 has been scored as a high severity vulnerability.
How to fix CVE-2009-1535?
To fix CVE-2009-1535, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-1535 being actively exploited in the wild?
It is possible that CVE-2009-1535 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~92% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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