CVE-2020-36177 : Vulnerability Insights and Analysis

RsaPad_PSS in wolfcrypt/src/rsa.c in wolfSSL before 4.6.0 has an out-of-bounds write for certain relationships between key size and digest size.

Understanding CVE-2020-36177

This CVE involves an out-of-bounds write vulnerability in wolfSSL before version 4.6.0.

What is CVE-2020-36177?

The vulnerability in RsaPad_PSS in wolfcrypt/src/rsa.c allows for an out-of-bounds write under specific key size and digest size conditions.

The Impact of CVE-2020-36177

The vulnerability could be exploited by attackers to potentially execute arbitrary code or cause a denial of service (DoS) on affected systems.

Technical Details of CVE-2020-36177

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The issue arises from an out-of-bounds write in RsaPad_PSS in wolfcrypt/src/rsa.c in wolfSSL versions prior to 4.6.0.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions before 4.6.0

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating key size and digest size relationships to trigger the out-of-bounds write.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update wolfSSL to version 4.6.0 or later to mitigate the vulnerability.
Monitor for any unusual activities on the network that could indicate exploitation attempts.

Long-Term Security Practices

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

Patching and Updates

Ensure timely application of security patches and updates to all relevant systems and software.