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CVE-2009-3555

CRITICALCVSS 9.8/10EPSS 87.26%

Last modified

CVE-2009-3555 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 87.26% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
87.26%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheHttp Server<= 2.2.14
GnuGnutls<= 2.8.5
MozillaNss<= 3.12.4
OpensslOpenssl<= 0.9.8k
OpensslOpenssl1.0
CanonicalUbuntu Linux8.04
CanonicalUbuntu Linux8.10
CanonicalUbuntu Linux9.04
CanonicalUbuntu Linux9.10
CanonicalUbuntu Linux10.04
CanonicalUbuntu Linux10.10
DebianDebian Linux4.0
DebianDebian Linux5.0
DebianDebian Linux6.0
DebianDebian Linux7.0
DebianDebian Linux8.0
FedoraprojectFedora11
FedoraprojectFedora12
FedoraprojectFedora13
FedoraprojectFedora14
F5Nginx>= 0.1.0, <= 0.8.22

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2009-3555?
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.
How severe is CVE-2009-3555?
CVE-2009-3555 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 87.26% probability of exploitation in the next 30 days.
How do I fix CVE-2009-3555?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-3555?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST