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CRITICAL

TLS: MITM attacks via session renegotiation

Published Nov 9, 2009

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.

Affected products

Remediation

Red Hat statement

Additional information can be found in the Red Hat Knowledgebase article: https://access.redhat.com/articles/20490

Metrics

Weaknesses (2)

CWE-295

Improper Certificate Validation

CWE-300

References (350)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Nov 9, 2009
Updated May 27, 2026
Reserved Oct 5, 2009
Link CVE-2009-3555
CISA Vulnrichment
Updated May 27, 2026
NVD
Status Modified
Modified Jun 16, 2026
Link CVE-2009-3555
Red Hat
Severity Moderate
Public date Nov 5, 2009
Links CVE-2009-3555 - Bugzilla
GHSA-F7W7-6PJC-WWM6