CVE-2018-16451 Explained : Impact and Mitigation

Buffer over-read vulnerabilities have been identified in the SMB parser of tcpdump versions prior to 4.9.3. These vulnerabilities occur specifically within the print-smb.c:print_trans() function when processing the \MAILSLOT\BROWSE and \PIPE\LANMAN parameters.

Understanding CVE-2018-16451

The SMB parser in tcpdump before version 4.9.3 is susceptible to buffer over-read vulnerabilities in the print-smb.c:print_trans() function.

What is CVE-2018-16451?

The CVE-2018-16451 vulnerability involves buffer over-reads in the SMB parser of tcpdump versions earlier than 4.9.3, specifically within the print-smb.c:print_trans() function.

The Impact of CVE-2018-16451

Attackers can exploit this vulnerability to cause denial of service or potentially execute arbitrary code on the affected system.
This vulnerability can lead to sensitive information exposure and compromise the security of the system.

Technical Details of CVE-2018-16451

The technical aspects of the CVE-2018-16451 vulnerability are as follows:

Vulnerability Description

The SMB parser in tcpdump before version 4.9.3 has buffer over-reads in print-smb.c:print_trans() for \MAILSLOT\BROWSE and \PIPE\LANMAN.

Affected Systems and Versions

Affected Systems: tcpdump versions prior to 4.9.3
Affected Function: print-smb.c:print_trans()

Exploitation Mechanism

Exploitation of this vulnerability occurs when processing the \MAILSLOT\BROWSE and \PIPE\LANMAN parameters in the print-smb.c:print_trans() function.

Mitigation and Prevention

To mitigate the risks associated with CVE-2018-16451, consider the following steps:

Immediate Steps to Take

Update tcpdump to version 4.9.3 or later to eliminate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update software and apply security patches to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Stay informed about security advisories and updates from tcpdump and relevant vendors.
Apply patches promptly to ensure the security of the system.