CVE-2017-12897 : Vulnerability Insights and Analysis

TCPDump before version 4.9.2 is vulnerable to a buffer over-read in the print-isoclns.c:isoclns_print() function.

Understanding CVE-2017-12897

What is CVE-2017-12897?

The vulnerability lies within the ISO CLNS parser in TCPDump, allowing for a buffer over-read.

The Impact of CVE-2017-12897

This vulnerability could be exploited by an attacker to potentially execute arbitrary code or cause a denial of service.

Technical Details of CVE-2017-12897

Vulnerability Description

The print-isoclns.c:isoclns_print() function in TCPDump versions prior to 4.9.2 contains a buffer over-read vulnerability within the ISO CLNS parser.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability could be exploited by crafting a malicious ISO CLNS packet to trigger the buffer over-read.

Mitigation and Prevention

Immediate Steps to Take

Update TCPDump to version 4.9.2 or later to mitigate the vulnerability.
Monitor vendor security advisories for patches and updates.

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 TCPDump promptly to address the buffer over-read vulnerability.