CVE-2019-1833

Current 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.

Basic Data

PublishedMay 16, 2019
Last ModifiedOctober 09, 2019
Assignercve@mitre.org
Data TypeCVE
Data FormatMITRE
Data Version4.0
Problem TypeCWE-693
CVE Data Version4.0

Base Metric V2

CVSS 2 - Version2.0
CVSS 2 - Vector StringAV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS 2 - Access VectorNETWORK
CVSS 2 - Access ComplexityLOW
CVSS 2 - AuthenticationNONE
CVSS 2 - Confidentiality ImpactNONE
CVSS 2 - Availability ImpactNONE
CVSS 2 - Base Score5.0
SeverityMEDIUM
Exploitability Score10.0
Impact Score2.9
Obtain All Privilegefalse
Obtain User Privilegefalse
Obtain Other Privilegefalse

Base Metric V3

CVSS 3 - Version3.0
CVSS 3 - Vector StringCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS 3 - Attack VectorNETWORK
CVSS 3 - Attack ComplexityLOW
CVSS 3 - Privileges RequiredNONE
CVSS 3 - User InteractionNONE
CVSS 3 - ScopeCHANGED
CVSS 3 - Confidentiality ImpactNONE
CVSS 3 - Integrity ImpactLOW
CVSS 3 - Availability ImpactNONE
CVSS 3 - Base Score5.8
CVSS 3 - Base SeverityMEDIUM
Exploitability Score3.9
Base SeverityMEDIUM

Configurations

  • OR - Configuration 1
    Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
    2.3ApplicationCiscoFirepower Management Center6.1.0*******
    2.3ApplicationCiscoFirepower Management Center6.2.0*******
    2.3ApplicationCiscoFirepower Management Center6.2.1*******
    2.3ApplicationCiscoFirepower Management Center6.2.2*******
    2.3ApplicationCiscoFirepower Management Center6.2.3*******

Vulnerable Software List

VendorProductVersions
Cisco Firepower Management Center 6.1.0, 6.2.0, 6.2.1, 6.2.2, 6.2.3

References

NameSourceURLTags
108338http://www.securityfocus.com/bid/108338BIDThird Party Advisory VDB Entry
20190515 Cisco Firepower Threat Defense Software SSL/TLS Policy Bypass Vulnerabilityhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-ftd-ssltls-bCISCOVendor Advisory