CVE-2019-1833

Name: CVE-2019-1833
Creator: NVD / NIST
Published: 2019-05-16T02:29:00.373+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.71%

Last modified Jun 17, 2026

CVE-2019-1833 is a vulnerability of currently unknown severity. A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) protocol parser of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies. The vulnerability is due to improper parsing of specific attributes in a TLS packet header. EPSS estimates a 1.71% chance of exploitation in the next 30 days.

Description

A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) protocol parser of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies. The vulnerability is due to improper parsing of specific attributes in a TLS packet header. An attacker could exploit this vulnerability by sending malicious TLS messages to the affected system. A successful exploit could allow the attacker to bypass the configured policies for the system, which could allow traffic to flow through without being inspected.

Metrics

EPSS Probability

1.71%

74.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Secure Firewall Management Center	6.1.0
Cisco	Secure Firewall Management Center	6.2.0
Cisco	Secure Firewall Management Center	6.2.1
Cisco	Secure Firewall Management Center	6.2.2
Cisco	Secure Firewall Management Center	6.2.3

References

http://www.securityfocus.com/bid/108338Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-ftd-ssltls-bypassVendor Advisory
http://www.securityfocus.com/bid/108338Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-ftd-ssltls-bypassVendor Advisory

Timeline

Published: May 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1833?

How severe is CVE-2019-1833?

Severity scoring for CVE-2019-1833 is pending analysis. The EPSS model estimates a 1.71% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1833?

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-2019-1833?

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

Scan your code now

Source: NVD / NIST