CVE-2019-1827 : Vulnerability Insights and Analysis

A vulnerability in the Online Help web service of Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers could allow an unauthorized attacker to execute a reflected cross-site scripting (XSS) attack.

Understanding CVE-2019-1827

This CVE involves a flaw in the Online Help web service of Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers, potentially enabling an attacker to conduct a reflected XSS attack.

What is CVE-2019-1827?

The vulnerability arises from inadequate validation of user input in the Online Help web service, allowing an attacker to execute arbitrary script code or access sensitive information via the user's browser.

The Impact of CVE-2019-1827

CVSS Base Score: 6.1 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Changed
Confidentiality Impact: Low
Integrity Impact: Low
Availability Impact: None

Technical Details of CVE-2019-1827

Vulnerability Description

The vulnerability allows an attacker to execute a reflected cross-site scripting (XSS) attack on users of the affected service by exploiting inadequate input validation.

Affected Systems and Versions

Product: Cisco Small Business RV Series Router Firmware
Vendor: Cisco
Affected Versions: Firmware releases earlier than version 1.4.2.22

Exploitation Mechanism

To exploit this vulnerability, an attacker needs to persuade a user to click on a malicious link, enabling the execution of arbitrary script code within the affected service's context.

Mitigation and Prevention

Immediate Steps to Take

Update the firmware to version 1.4.2.22 or later to mitigate the vulnerability.
Educate users about the risks of clicking on unknown or suspicious links.

Long-Term Security Practices

Regularly monitor and apply security patches and updates to all network devices.
Implement web application firewalls and input validation mechanisms to prevent XSS attacks.

Patching and Updates

Cisco has not reported any public announcements or known malicious use of this vulnerability.