SSL Decryption Bypass in Cisco Firepower System Software
CVE-2017-6766

7.5HIGH

Key Information:

Vendor

Cisco
Status
Cisco Firepower System Software
Vendor
CVE Published:
7 August 2017

What is CVE-2017-6766?

A security flaw in the SSL Decryption and Inspection feature of Cisco Firepower System Software can enable attackers to bypass SSL policies. This vulnerability arises from unexpected interactions between configuration settings related to Known Key and Decrypt and Resign when the software processes abnormal SSL packet headers. By sending a specially crafted SSL packet through a valid session, an unauthenticated, remote attacker can evade the decryption and inspection controls intended to scrutinize network traffic, potentially compromising the integrity of network security measures.

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Affected Version(s)

Cisco Firepower System Software Cisco Firepower System Software

References

https://tools.cisco.com/security/center/content/CiscoSecu...
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https://quickview.cloudapps.cisco.com/quickview/bug/CSCve...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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