CVE-2009-3555
9.8 · CRITICALOverview
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
| Vendor | Product | Versions | Status |
|---|---|---|---|
| apache | http_server | 0 | Affected |
| gnu | gnutls | 0 | Affected |
| mozilla | nss | 0 | Affected |
| openssl | openssl | 0 | Affected |
| f5 | nginx | 0.1.0 | Affected |
References
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's AI-powered security agents can automatically detect CVE-2009-3555 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related CRITICAL CVEs from 2009
View all →Multiple use-after-free vulnerabilities in vnc.c in the VNC server in QEMU 0.10.6 and earlier might
The MD5 Message-Digest Algorithm is not collision resistant, which makes it easier for context-depen
SMB in the Server service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vi
Static code injection vulnerability in setup.php in phpMyAdmin 2.11.x before 2.11.9.5 and 3.x before
_functions.php in cpCommerce 1.2.x, possibly including 1.2.9, sends a redirect but does not exit whe
cpanel/login.php in EgyPlus 7ammel (aka 7ml) 1.0.1 and earlier sends a redirect to the web browser b
cgi-bin/makecgi-pro in Iomega StorCenter Pro generates predictable session IDs, which allows remote
admin.php in phpMyBlockchecker 1.0.0055 allows remote attackers to bypass authentication and gain ad
The example code for the digest authentication functionality (http_authentication.rb) in Ruby on Rai
The Active Template Library (ATL) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vi
The web interface on the snom VoIP phones snom 300, snom 320, snom 360, snom 370, and snom 820 with
The Scanner File Utility (aka listener) in Kyocera Mita (KM) 3.3.0.1 allows remote attackers to bypa