CVE-2017-6339: trendmicro interscan_web_security_virtual_appliance Improper Privilege Management

Vulnerability summary

CVE-2017-6339 is a medium (CVSS 6.5) Improper Privilege Management vulnerability in trendmicro interscan_web_security_virtual_appliance. EPSS estimates a 4.07% chance of exploitation in the next 30 days, higher than 90.5% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 05-04-2017
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

Trend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5 before CP 1746 mismanages certain key and certificate data. Per IWSVA documentation, by default, IWSVA acts as a private Certificate Authority (CA) and dynamically generates digital certificates that are sent to client browsers to complete a secure passage for HTTPS connections. It also allows administrators to upload their own certificates signed by a root CA. An attacker with low privileges can download the current CA certificate and Private Key (either the default ones or ones uploaded by administrators) and use those to decrypt HTTPS traffic, thus compromising confidentiality. Also, the default Private Key on this appliance is encrypted with a very weak passphrase. If an appliance uses the default Certificate and Private Key provided by Trend Micro, an attacker can simply download these and decrypt the Private Key using the default/weak passphrase.

• CWE-269Improper Privilege ManagementThe product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
• CWE-521Weak Password RequirementsThe product does not require that users should have strong passwords.