CVE-2020-27509 : Exploit Details and Defense Strategies

Persistent XSS in Galaxkey Secure Mail Client in Galaxkey up to version 5.6.11.5 allows attackers to execute a full account takeover by injecting malicious code into email subjects.

Understanding CVE-2020-27509

This CVE involves a persistent XSS vulnerability in the Galaxkey Secure Mail Client, enabling attackers to compromise user accounts.

What is CVE-2020-27509?

The vulnerability in Galaxkey Secure Mail Client up to version 5.6.11.5 permits attackers to intercept HTTP Post requests during email transmission and insert a crafted XSS payload in the 'subject' field. When the recipient accesses their mailbox, the payload triggers, leading to an account takeover.

The Impact of CVE-2020-27509

The exploitation of this vulnerability can result in severe consequences, including unauthorized access to sensitive information, manipulation of emails, and potential data breaches.

Technical Details of CVE-2020-27509

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability allows threat actors to execute a persistent XSS attack by injecting malicious code into email subjects, leading to a complete account takeover.

Affected Systems and Versions

Product: Galaxkey Secure Mail Client
Versions affected: Up to 5.6.11.5

Exploitation Mechanism

The attack occurs by intercepting HTTP Post requests during email sending and injecting a specially crafted XSS payload into the 'subject' field. Upon the recipient logging into their mailbox, the payload executes, compromising the account.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate action and long-term security measures.

Immediate Steps to Take

Update Galaxkey Secure Mail Client to the latest version to patch the vulnerability.
Educate users about phishing techniques and suspicious email content to prevent successful attacks.

Long-Term Security Practices

Implement regular security training for employees to enhance awareness of cybersecurity threats.
Utilize email filtering solutions to detect and block malicious emails containing XSS payloads.

Patching and Updates

Regularly apply security patches and updates to all software and applications to address known vulnerabilities and enhance overall security.