CVE-2020-27635 : What You Need to Know

PicoTCP 1.7.0 TCP ISNs are improperly random.

Understanding CVE-2020-27635

In PicoTCP 1.7.0, a vulnerability exists where TCP ISNs (Initial Sequence Numbers) are not properly randomized.

What is CVE-2020-27635?

This CVE refers to a specific issue in PicoTCP 1.7.0 where the generation of TCP ISNs is flawed, potentially leading to security risks.

The Impact of CVE-2020-27635

The improper randomization of TCP ISNs can expose systems to potential attacks, such as TCP sequence prediction attacks, which may compromise network security.

Technical Details of CVE-2020-27635

PicoTCP 1.7.0 vulnerability details.

Vulnerability Description

The vulnerability lies in the improper randomization of TCP ISNs in PicoTCP 1.7.0, making it easier for attackers to predict and potentially manipulate network traffic.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions of PicoTCP 1.7.0 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the predictable nature of TCP ISNs to launch sequence prediction attacks, potentially leading to unauthorized access or data manipulation.

Mitigation and Prevention

Steps to address CVE-2020-27635.

Immediate Steps to Take

Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any unusual patterns or unauthorized access attempts.
Consider using intrusion detection systems to detect and respond to suspicious activities.

Long-Term Security Practices

Regularly update PicoTCP to the latest version to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address any weaknesses in network security.

Patching and Updates

Apply patches or updates provided by PicoTCP to address the vulnerability and improve network security.