CVE-2017-12997 : Vulnerability Insights and Analysis

A bug in the print-lldp.c:lldp_private_8021_print() function of tcpdump versions prior to 4.9.2 can lead to an infinite loop in the LLDP parser.

Understanding CVE-2017-12997

This CVE involves a vulnerability in tcpdump that could cause the LLDP parser to enter an infinite loop.

What is CVE-2017-12997?

The bug in the print-lldp.c:lldp_private_8021_print() function of tcpdump versions before 4.9.2 triggers an infinite loop in the LLDP parser.

The Impact of CVE-2017-12997

The vulnerability can potentially lead to a denial of service (DoS) condition by causing the LLDP parser to consume excessive resources, impacting system performance.

Technical Details of CVE-2017-12997

This section provides more technical insights into the CVE.

Vulnerability Description

The LLDP parser in tcpdump versions earlier than 4.9.2 may enter an infinite loop due to a flaw in the print-lldp.c:lldp_private_8021_print() function.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions prior to 4.9.2

Exploitation Mechanism

The vulnerability can be exploited by sending specially crafted LLDP packets to the affected system, triggering the infinite loop in the LLDP parser.

Mitigation and Prevention

To address CVE-2017-12997, follow these mitigation strategies:

Immediate Steps to Take

Update tcpdump to version 4.9.2 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update software and firmware to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply patches and updates provided by the tcpdump project to fix the vulnerability.