CVE-2019-11856 Explained : Impact and Mitigation
Learn about CVE-2019-11856, a vulnerability in ALEOS ACEView service allowing message replay attacks. Find out affected versions, exploitation details, and mitigation steps.
The ACEView service in ALEOS versions prior to 4.13.0, 4.9.5, and 4.4.9 has a vulnerability related to nonce reuse, enabling message replay and potential security risks.
Understanding CVE-2019-11856
What is CVE-2019-11856?
A nonce reuse vulnerability in the ACEView service of ALEOS before specific versions allows captured traffic to be replayed on other gateways sharing the same credentials.
The Impact of CVE-2019-11856
The vulnerability enables message replay, potentially leading to security risks if unauthorized traffic is replayed on gateways with the same credentials.
Technical Details of CVE-2019-11856
Vulnerability Description
The vulnerability in ALEOS ACEView service allows for nonce reuse, facilitating message replay attacks.
Affected Systems and Versions
- ALEOS versions prior to 4.13.0, 4.9.5, and 4.4.9
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Network
- Privileges Required: High
- User Interaction: None
- Scope: Unchanged
- CVSS Score: 3.3 (Low)
Mitigation and Prevention
Immediate Steps to Take
- Update ALEOS to versions 4.13.0, 4.9.5, or 4.4.9 to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Implement strong credential management practices.
- Regularly update and patch systems to prevent vulnerabilities.
Patching and Updates
- Apply patches and updates provided by the vendor to address the nonce reuse vulnerability.