CVE-2023-45237 : Vulnerability Insights and Analysis

This article provides an in-depth analysis of CVE-2023-45237, which involves the use of a Weak PseudoRandom Number Generator in the EDK II Network Package.

Understanding CVE-2023-45237

CVE-2023-45237 highlights a vulnerability in EDK II's Network Package that allows attackers to exploit a predictable TCP Initial Sequence Number, potentially leading to unauthorized access and confidentiality breaches.

What is CVE-2023-45237?

CVE-2023-45237 exposes a security flaw in the EDK II Network Package, making it susceptible to predictable TCP Initial Sequence Numbers. This weakness can be leveraged by threat actors to gain unauthorized access and compromise the confidentiality of sensitive information.

The Impact of CVE-2023-45237

The impact of CVE-2023-45237 is significant as it can enable attackers to subvert environmental variable values, potentially compromising the integrity of the system and leading to a loss of confidentiality.

Technical Details of CVE-2023-20657

CVE-2023-45237 has been assigned a CVSS v3.1 base score of 5.3, categorizing it as a medium-severity vulnerability. The vulnerability is characterized by a low attack complexity and network-based attack vector, with a confidentiality impact rated as low.

Vulnerability Description

The vulnerability arises from the use of a weak pseudo-random number generator in the EDK II Network Package, allowing attackers to predict TCP Initial Sequence Numbers.

Affected Systems and Versions

The affected product is 'edk2' by 'TianoCore,' specifically version 'edk2-stable202308.'

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the predictable TCP Initial Sequence Number flaw in the EDK II Network Package to gain unauthorized access.

Mitigation and Prevention

To address CVE-2023-45237, immediate steps should be taken to secure systems and prevent unauthorized access.

Immediate Steps to Take

Implementing access controls, network monitoring, and regular security patching can help mitigate the risk posed by this vulnerability.

Long-Term Security Practices

Enforcing secure coding practices, conducting regular security assessments, and staying informed about emerging threats are essential for long-term security.

Patching and Updates

Vendor-supplied patches should be applied promptly to fix the weakness and protect systems from exploitation.