CVE-2019-18378 : Security Advisory and Response

Symantec Messaging Gateway, prior to version 10.7.3, is vulnerable to a cross-site scripting (XSS) exploit, potentially allowing attackers to inject scripts on web pages viewed by other users.

Understanding CVE-2019-18378

Before version 10.7.3, Symantec Messaging Gateway could potentially be vulnerable to a specific kind of security breach known as cross-site scripting (XSS).

What is CVE-2019-18378?

Cross-site scripting (XSS) is a type of security vulnerability that enables attackers to inject malicious scripts into web pages viewed by other users, compromising their browsing experience and potentially bypassing access controls.

The Impact of CVE-2019-18378

Exploiting this vulnerability could allow attackers to inject scripts on web pages seen by other users, compromising their browsing experience and potentially circumventing access controls.

Technical Details of CVE-2019-18378

Symantec Messaging Gateway, prior to version 10.7.3, is affected by the following:

Vulnerability Description

XSS vulnerability allows attackers to inject client-side scripts into web pages viewed by other users.

Affected Systems and Versions

Product: Symantec Messaging Gateway
Versions Affected: Prior to 10.7.3

Exploitation Mechanism

Attackers can exploit the XSS vulnerability to inject scripts on web pages, compromising user experience and potentially bypassing access controls.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial:

Immediate Steps to Take

Update Symantec Messaging Gateway to version 10.7.3 or later.
Regularly monitor and audit web pages for any suspicious scripts.

Long-Term Security Practices

Educate users on safe browsing habits to prevent XSS attacks.
Implement web application firewalls to detect and block malicious scripts.

Patching and Updates

Apply security patches and updates promptly to mitigate the XSS vulnerability in Symantec Messaging Gateway.