CVE-2017-3887 : Vulnerability Insights and Analysis
Learn about CVE-2017-3887, a vulnerability in Cisco Firepower System Software allowing remote attackers to trigger a denial of service situation. Find out affected versions and mitigation steps.
A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthorized remote attacker to trigger a denial of service (DoS) situation by causing the Snort process to restart unexpectedly. This CVE affects versions of Cisco Firepower System Software prior to the first fixed release when configured with an SSL Decrypt-Resign policy.
Understanding CVE-2017-3887
This CVE, published on April 7, 2017, highlights a specific vulnerability in Cisco Firepower System Software.
What is CVE-2017-3887?
The flaw in the detection engine handling SSL packets in Cisco Firepower System Software can be exploited by a remote attacker to induce a DoS scenario due to the Snort process restarting unexpectedly.
The Impact of CVE-2017-3887
The vulnerability could lead to a denial of service situation, affecting the availability and performance of the Cisco Firepower System Software.
Technical Details of CVE-2017-3887
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability lies in the SSL packet processing of the detection engine in Cisco Firepower System Software, potentially enabling a remote attacker to disrupt the Snort process, causing a DoS condition.
Affected Systems and Versions
- Versions affected: 6.0.1, 6.1.0, and 6.2.0
Exploitation Mechanism
The vulnerability can be exploited by an unauthorized remote attacker when the affected software is configured with an SSL Decrypt-Resign policy.
Mitigation and Prevention
Understanding how to mitigate and prevent the exploitation of this vulnerability is crucial.
Immediate Steps to Take
- Upgrade to fixed releases: 6.2.0 and 6.1.0.2
- Implement network segmentation to limit the impact of potential attacks
Long-Term Security Practices
- Regularly monitor and update security patches for the Cisco Firepower System Software
- Conduct security assessments and penetration testing to identify and address vulnerabilities
Patching and Updates
- Apply the available fixed releases promptly to address the vulnerability and enhance system security