CVE-2017-6339 : Exploit Details and Defense Strategies

Trend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5 before CP 1746 mishandles key and certificate data, potentially leading to the decryption of HTTPS traffic.

Understanding CVE-2017-6339

Trend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5 before CP 1746 has a vulnerability that allows an attacker to obtain key and certificate data, compromising confidentiality.

What is CVE-2017-6339?

The vulnerability in Trend Micro IWSVA 6.5 allows attackers with limited privileges to access the Certificate Authority (CA) certificate and Private Key, enabling them to decrypt HTTPS traffic.

The Impact of CVE-2017-6339

Attackers can compromise the confidentiality of HTTPS traffic by exploiting the mishandled key and certificate data in IWSVA 6.5.
Default Private Key protection with a weak passphrase increases the risk of decryption by unauthorized individuals.

Technical Details of CVE-2017-6339

Trend Micro IWSVA 6.5 before CP 1746 vulnerability details.

Vulnerability Description

IWSVA functions as a private Certificate Authority (CA) and generates digital certificates for securing HTTPS connections.
Weak passphrase protection on the default Private Key poses a security risk.

Affected Systems and Versions

Product: Trend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5
Vendor: Trend Micro
Versions: All versions before CP 1746

Exploitation Mechanism

Attackers with limited privileges can access CA certificate and Private Key to decrypt HTTPS traffic.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2017-6339.

Immediate Steps to Take

Update IWSVA to CP 1746 or later to address the vulnerability.
Avoid using default certificates and Private Keys provided by Trend Micro.

Long-Term Security Practices

Regularly review and update certificates and Private Keys with strong passphrases.
Implement access controls to restrict unauthorized access to key and certificate data.

Patching and Updates

Apply patches and updates provided by Trend Micro to fix the vulnerability in IWSVA.