CVE-2017-5203 : Security Advisory and Response

In the tcpdump version prior to 4.9.0, a buffer overflow vulnerability in the print-bootp.c file affects the BOOTP parser during the execution of the bootp_print() function.

Understanding CVE-2017-5203

What is CVE-2017-5203?

The vulnerability lies in the BOOTP parser in tcpdump before version 4.9.0, specifically in the print-bootp.c:bootp_print() function.

The Impact of CVE-2017-5203

This vulnerability allows for a buffer overflow, potentially leading to arbitrary code execution or denial of service.

Technical Details of CVE-2017-5203

Vulnerability Description

The buffer overflow vulnerability in the BOOTP parser within tcpdump's print-bootp.c file can be exploited during the execution of the bootp_print() function.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions prior to 4.9.0

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious BOOTP packet to trigger the buffer overflow.

Mitigation and Prevention

Immediate Steps to Take

Update tcpdump to version 4.9.0 or later to mitigate the vulnerability.
Monitor vendor advisories for patches and apply them promptly.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Implement network segmentation to limit the impact of potential exploits.

Patching and Updates

Apply patches provided by the vendor to address the buffer overflow vulnerability in tcpdump.