CVE-2020-7761 Explained : Impact and Mitigation

This CVE-2020-7761 article provides insights into a vulnerability affecting the package @absolunet/kafe before version 3.2.10, leading to denial of service when validating crafted invalid emails.

Understanding CVE-2020-7761

This section delves into the impact and technical details of CVE-2020-7761.

What is CVE-2020-7761?

CVE-2020-7761 is a vulnerability in the package @absolunet/kafe before version 3.2.10, allowing a denial of service attack during the validation of malformed email addresses.

The Impact of CVE-2020-7761

The vulnerability has a CVSS v3.1 base score of 5.3, indicating a medium severity issue with low attack complexity and impact on availability.

Technical Details of CVE-2020-7761

This section provides a deeper dive into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in @absolunet/kafe before 3.2.10 allows for a Regular Expression Denial of Service (ReDoS) attack when processing invalid email inputs.

Affected Systems and Versions

Package: @absolunet/kafe
Versions Affected: < 3.2.10

Exploitation Mechanism

The vulnerability can be exploited by sending specially crafted invalid email addresses to trigger the denial of service condition.

Mitigation and Prevention

Understanding how to mitigate and prevent the exploitation of CVE-2020-7761 is crucial.

Immediate Steps to Take

Update the @absolunet/kafe package to version 3.2.10 or higher to eliminate the vulnerability.
Monitor and restrict inputs to prevent the submission of crafted invalid emails.

Long-Term Security Practices

Regularly update software packages to patch known vulnerabilities.
Implement input validation mechanisms to detect and block malicious inputs.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by the package maintainers to address vulnerabilities.