CVE-2017-3867 : Vulnerability Insights and Analysis

A vulnerability in the Cisco Adaptive Security Appliance (ASA) Software's implementation of Border Gateway Protocol (BGP) Bidirectional Forwarding Detection (BFD) could allow an attacker to bypass access control lists for specific TCP and UDP traffic.

Understanding CVE-2017-3867

This CVE involves a security vulnerability in Cisco ASA Software that could be exploited by an unauthenticated remote attacker to bypass ACLs.

What is CVE-2017-3867?

The vulnerability in Cisco ASA Software's BGP BFD implementation allows unauthorized access to specific TCP and UDP traffic, potentially leading to security breaches.

The Impact of CVE-2017-3867

The vulnerability poses a risk of ACL bypass, enabling attackers to circumvent security measures and gain unauthorized access to sensitive network traffic.

Technical Details of CVE-2017-3867

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability in Cisco ASA Software's BGP BFD implementation allows unauthenticated remote attackers to bypass ACLs for specific TCP and UDP traffic.

Affected Systems and Versions

Product: Cisco Adaptive Security Appliance
Affected Version: 9.6(2)

Exploitation Mechanism

Attackers can exploit this vulnerability remotely to bypass ACLs and gain unauthorized access to specific TCP and UDP traffic.

Mitigation and Prevention

Protect your systems from CVE-2017-3867 with these mitigation strategies.

Immediate Steps to Take

Apply the recommended patches provided by Cisco for the affected software versions.
Monitor network traffic for any suspicious activity that may indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update and patch your Cisco ASA Software to address known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential security breaches.

Patching and Updates

Update affected Cisco ASA Software versions to the fixed releases: 99.1(20.1), 99.1(10.2), 98.1(12.7), 98.1(1.49), 97.1(6.58), 97.1(0.134), 96.2(0.109), 9.7(1.1), 9.6(2.99), and 9.6(2.8) to mitigate the vulnerability.