CVE-2019-7477 : Vulnerability Insights and Analysis

A vulnerability found in SonicWall SonicOS and SonicOSv TLS CBC Cipher allows remote attackers to gain access to sensitive plain text data when CBC cipher suites are enabled. This vulnerability impacts various versions of SonicOS and SonicOSv.

Understanding CVE-2019-7477

This CVE identifies a security flaw in SonicWall products that can be exploited by attackers to access plaintext data.

What is CVE-2019-7477?

CVE-2019-7477 is a vulnerability in SonicWall SonicOS and SonicOSv that enables remote attackers to obtain sensitive plaintext data when CBC cipher suites are active.

The Impact of CVE-2019-7477

The vulnerability affects multiple versions of SonicOS and SonicOSv, potentially exposing sensitive information to unauthorized access.

Technical Details of CVE-2019-7477

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in SonicWall SonicOS and SonicOSv TLS CBC Cipher allows attackers to access plaintext data when CBC cipher suites are in use.

Affected Systems and Versions

SonicOS Gen 5 versions 5.9.1.10 and earlier, Gen 6 versions 6.2.7.3, 6.5.1.3, 6.5.2.2, 6.5.3.1, 6.2.7.8, 6.4.0.0, 6.5.1.8, 6.0.5.3-86o
SonicOSv versions 6.5.0.2-8v_RC363 (VMWARE), 6.5.0.2.8v_RC367 (AZURE), 6.5.0.2.8v_RC368 (AWS), 6.5.0.2.8v_RC366 (HYPER_V)

Exploitation Mechanism

The vulnerability can be exploited remotely by attackers to access plaintext data when CBC cipher suites are enabled.

Mitigation and Prevention

Protect your systems from CVE-2019-7477 with the following steps:

Immediate Steps to Take

Disable CBC cipher suites if not required
Apply patches and updates provided by SonicWall

Long-Term Security Practices

Regularly monitor for security advisories from SonicWall
Implement strong encryption protocols and best practices

Patching and Updates

Ensure that you promptly apply patches and updates released by SonicWall to address the CVE-2019-7477 vulnerability.