CVE-2019-6485 : What You Need to Know
Learn about CVE-2019-6485 affecting Citrix NetScaler Gateway & Application Delivery Controller, exposing sensitive plaintext information to unauthorized remote attackers. Find mitigation steps and patching details.
Citrix NetScaler Gateway and Application Delivery Controller are affected by a TLS Padding Oracle Vulnerability that could expose sensitive plaintext information to unauthorized remote attackers.
Understanding CVE-2019-6485
What is CVE-2019-6485?
The vulnerability in Citrix NetScaler Gateway and Application Delivery Controller allows remote attackers to access sensitive plaintext information due to a TLS Padding Oracle Vulnerability when CBC-based cipher suites are active.
The Impact of CVE-2019-6485
This vulnerability could potentially lead to unauthorized access to sensitive data, posing a significant security risk to affected systems.
Technical Details of CVE-2019-6485
Vulnerability Description
The vulnerability affects specific versions of Citrix NetScaler Gateway and Application Delivery Controller, enabling attackers to exploit a TLS Padding Oracle Vulnerability.
Affected Systems and Versions
- Citrix NetScaler Gateway: 12.1 before build 50.31, 12.0 before build 60.9, 11.1 before build 60.14, 11.0 before build 72.17, and 10.5 before build 69.5
- Application Delivery Controller (ADC): 12.1 before build 50.31, 12.0 before build 60.9, 11.1 before build 60.14, 11.0 before build 72.17, and 10.5 before build 69.5
Exploitation Mechanism
The vulnerability can be exploited by unauthorized remote attackers when CBC-based cipher suites are active, potentially exposing sensitive plaintext information.
Mitigation and Prevention
Immediate Steps to Take
- Disable CBC-based cipher suites on affected Citrix NetScaler Gateway and Application Delivery Controller versions.
- Monitor for any unauthorized access or unusual activities on the network.
Long-Term Security Practices
- Regularly update and patch Citrix NetScaler Gateway and Application Delivery Controller to the latest secure versions.
- Implement strong encryption protocols and security measures to protect sensitive data.
Patching and Updates
Apply the necessary security patches provided by Citrix to address the vulnerability and enhance the security of the affected systems.