CVE-2017-13035 : What You Need to Know

The ISO IS-IS parser in tcpdump version earlier than 4.9.2 experiences a buffer over-read issue in the file print-isoclns.c at the function isis_print_id.

Understanding CVE-2017-13035

The vulnerability identified as CVE-2017-13035 affects tcpdump versions prior to 4.9.2, leading to a buffer over-read issue in the ISO IS-IS parser.

What is CVE-2017-13035?

The CVE-2017-13035 vulnerability is a buffer over-read flaw in the print-isoclns.c file's isis_print_id() function within tcpdump versions before 4.9.2.

The Impact of CVE-2017-13035

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

Technical Details of CVE-2017-13035

Vulnerability Description

The buffer over-read issue in tcpdump's ISO IS-IS parser before version 4.9.2 allows attackers to read beyond the allocated memory, potentially leading to information disclosure or system compromise.

Affected Systems and Versions

Product: tcpdump
Vendor: N/A
Versions Affected: All versions before 4.9.2

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious IS-IS packet, causing the tcpdump parser to read beyond the intended memory buffer, potentially leading to a security compromise.

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 to limit the impact of potential attacks.

Patching and Updates

Apply patches and updates provided by the tcpdump vendor to address the buffer over-read vulnerability.