CVE-2017-12998 : Security Advisory and Response

The IS-IS parser in tcpdump versions prior to 4.9.2 experiences a buffer over-read issue in the print-isoclns.c file, specifically in the isis_print_extd_ip_reach() function.

Understanding CVE-2017-12998

This CVE involves a buffer over-read vulnerability in tcpdump versions before 4.9.2.

What is CVE-2017-12998?

The vulnerability in the IS-IS parser of tcpdump versions prior to 4.9.2 allows for a buffer over-read in the isis_print_extd_ip_reach() function.

The Impact of CVE-2017-12998

The vulnerability could be exploited by an attacker to potentially execute arbitrary code or cause a denial of service (DoS) condition.

Technical Details of CVE-2017-12998

This section provides more technical insights into the CVE.

Vulnerability Description

The IS-IS parser in tcpdump before version 4.9.2 has a buffer over-read in print-isoclns.c:isis_print_extd_ip_reach().

Affected Systems and Versions

Affected: tcpdump versions prior to 4.9.2

Exploitation Mechanism

Attackers could exploit this vulnerability to trigger a buffer over-read, potentially leading to code execution or DoS attacks.

Mitigation and Prevention

Protecting systems from CVE-2017-12998 is crucial to maintaining security.

Immediate Steps to Take

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

Long-Term Security Practices

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

Patching and Updates

Apply patches and updates provided by the vendor to address the vulnerability.