CVE-2017-13016 Explained : Impact and Mitigation

In the tcpdump version prior to 4.9.2, a buffer over-read issue exists in the print-isoclns.c file within the esis_print() function, affecting ISO ES-IS parsing.

Understanding CVE-2017-13016

What is CVE-2017-13016?

The vulnerability in tcpdump before version 4.9.2 allows for a buffer over-read in the esis_print() function handling ISO ES-IS parsing.

The Impact of CVE-2017-13016

This vulnerability could be exploited by an attacker to potentially execute arbitrary code or cause a denial of service (DoS) on the affected system.

Technical Details of CVE-2017-13016

Vulnerability Description

The buffer over-read issue in the print-isoclns.c file within the esis_print() function of tcpdump versions prior to 4.9.2.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious ISO ES-IS packet to trigger the buffer over-read in the tcpdump software.

Mitigation and Prevention

Immediate Steps to Take

Update tcpdump to version 4.9.2 or later to mitigate the vulnerability.
Monitor vendor advisories and apply patches promptly.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Implement network segmentation and access controls to limit exposure to potential attacks.

Patching and Updates

Apply patches provided by the software vendor to address the buffer over-read issue in tcpdump.