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CVE-2009-3555

9.8 · CRITICAL

The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0…

Published Nov 9, 2009apacheCWE-295EPSS 87.26%

Overview

CVE-2009-3555 is a critical-severity vulnerability affecting apache http_server. It was published on November 9, 2009 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, multiple Cisco products, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a "plaintext injection" attack, aka the "Project Mogul" issue.

Remediation

Check the references section for vendor advisories and patches from apache. Update http_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
apachehttp_server0Affected
gnugnutls0Affected
mozillanss0Affected
opensslopenssl0Affected
f5nginx0.1.0Affected

References

Refarchives.neohapsis.com/archives/bugtraq/2013-11/0120.htmlRefblog.g-sec.lu/2009/11/tls-sslv3-renegotiation-vulnerability.htmlRefblogs.iss.net/archive/sslmitmiscsrf.htmlRefblogs.sun.com/security/entry/vulnerability_in_tls_protocol_duringRefclicky.me/tlsvulnRefextendedsubset.com/?p=8Refextendedsubset.com/Renegotiating_TLS.pdfRefh20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01945686Refh20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02436041Refitrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02273751

How CyberStrike helps

Frequently asked questions

What is CVE-2009-3555?

CVE-2009-3555 is a critical-severity vulnerability affecting apache http_server. It was published on November 9, 2009 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2009-3555?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-3555?

Check the references section for vendor advisories and patches from apache. Update http_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-2009-3555?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-3555 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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