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CVE-2009-1135

9.0 · HIGH

Microsoft Internet Security and Acceleration (ISA) Server 2006 Gold and SP1, when Radius OTP is enabled, uses the HTTP-Basic authentication method, which allows remote attackers to gain the privile…

Published Jul 15, 2009microsoftCWE-264EPSS 26.45%

Overview

CVE-2009-1135 is a high-severity vulnerability affecting microsoft isa_server. It was published on July 15, 2009 and has a CVSS 2.0 base score of 9.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 9.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Microsoft Internet Security and Acceleration (ISA) Server 2006 Gold and SP1, when Radius OTP is enabled, uses the HTTP-Basic authentication method, which allows remote attackers to gain the privileges of an arbitrary account, and access published web pages, via vectors involving attempted access to a network resource behind the ISA Server, aka "Radius OTP Bypass Vulnerability."

Remediation

Check the references section for vendor advisories and patches from microsoft. Update isa_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecunia.com/advisories/35784Refwww.securitytracker.com/id?1022547Refwww.us-cert.gov/cas/techalerts/TA09-195A.htmlRefwww.vupen.com/english/advisories/2009/1889Refdocs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-031Refoval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5649Refsecunia.com/advisories/35784Refwww.securitytracker.com/id?1022547Refwww.us-cert.gov/cas/techalerts/TA09-195A.htmlRefwww.vupen.com/english/advisories/2009/1889

How CyberStrike helps

Frequently asked questions

What is CVE-2009-1135?

CVE-2009-1135 is a high-severity vulnerability affecting microsoft isa_server. It was published on July 15, 2009 and has a CVSS 2.0 base score of 9.0 (HIGH).

How severe is CVE-2009-1135?

This vulnerability has a CVSS 2.0 base score of 9.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2009-1135?

Check the references section for vendor advisories and patches from microsoft. Update isa_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-1135?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-1135 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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