Rule Category

POLICY-OTHER --

Alert Message

POLICY-OTHER SSL weak 3DES cipher suite use attempt

Rule Explanation

The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other protocols and products, have a birthday bound of approximately four billion blocks, which makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTPS session using Triple DES in CBC mode, aka a "Sweet32" attack. Impact: CVSS base score 5.3 CVSS impact score 1.4 CVSS exploitability score 3.9 confidentialityImpact LOW integrityImpact NONE availabilityImpact NONE Details: Ease of Attack:

What To Look For

This rule alerts when an attempt to enumerate weak cipher suites is being performed.

Known Usage

No public information

False Positives

No known false positives

Contributors

Talos research team. This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology. For more information see [nvd].

MITRE ATT&CK Framework

Tactic: Discovery

Technique: Account Discovery

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

CVE

Rule Vulnerability

CVE Additional Information

CVE-2016-2183
The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other protocols and products, have a birthday bound of approximately four billion blocks, which makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTPS session using Triple DES in CBC mode, aka a "Sweet32" attack.
Details
Severity Base Score5.3
Impact Score1.4 Exploit Score3.9
Confidentiality ImpactLOW Integrity ImpactNONE
Availability ImpactNONE Access Vector
Authentication Ease of Access