CVE-2020-12740 : What You Need to Know

Tcprewrite in Tcpreplay through version 4.3.2 is affected by a heap-based buffer over-read vulnerability during a get_c operation. The vulnerability occurs in the get_ipv6_next() function at common/get.c.

Understanding CVE-2020-12740

This CVE entry describes a specific vulnerability in Tcprewrite software.

What is CVE-2020-12740?

The vulnerability in Tcprewrite allows for a heap-based buffer over-read during a get_c operation, triggered in the get_ipv6_next() function.

The Impact of CVE-2020-12740

The vulnerability could potentially be exploited by an attacker to read sensitive information from the heap memory, leading to information disclosure or denial of service.

Technical Details of CVE-2020-12740

Tcprewrite vulnerability details.

Vulnerability Description

The vulnerability in Tcprewrite allows a heap-based buffer over-read during a get_c operation, specifically in the get_ipv6_next() function.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions up to and including 4.3.2

Exploitation Mechanism

The issue is triggered in the get_ipv6_next() function at common/get.c, allowing an attacker to exploit the vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2020-12740.

Immediate Steps to Take

Apply patches or updates provided by the software vendor.
Monitor vendor advisories and security mailing lists for any updates.
Consider implementing network-level protections to mitigate potential exploitation.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Conduct security assessments and penetration testing to identify and address vulnerabilities.
Implement strong access controls and least privilege principles to limit exposure.
Educate users and administrators about secure coding practices and potential threats.

Patching and Updates

Ensure that the Tcprewrite software is updated to version 4.3.3 or later to mitigate the vulnerability.