CVE-2021-22873 : Security Advisory and Response

Revive Adserver before version 5.1.0 is vulnerable to open redirects via specific parameters in delivery scripts, leading to a security issue that was previously designed for third-party ad servers.

Understanding CVE-2021-22873

This CVE highlights a vulnerability in Revive Adserver that allows open redirects via certain parameters in delivery scripts.

What is CVE-2021-22873?

Revive Adserver versions before 5.1.0 are susceptible to open redirects through parameters such as

dest

,

oadest

, and/or

ct0

in the delivery scripts, enabling a potential security breach.

The Impact of CVE-2021-22873

This vulnerability could be exploited by malicious actors to conduct open redirect attacks, compromising the security and integrity of the ad delivery system.

Technical Details of CVE-2021-22873

In-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from the ability to perform open redirects via specific parameters in the delivery scripts, exposing the system to exploitation.

Affected Systems and Versions

Revive Adserver versions before 5.1.0 are affected by this open redirect vulnerability.

Exploitation Mechanism

Malicious entities can abuse the vulnerable parameters to launch open redirect attacks and potentially redirect users to malicious sites.

Mitigation and Prevention

Effective strategies to mitigate and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Upgrade to version 5.1.0 or later to address and remediate this vulnerability. Additionally, monitor and restrict the use of potentially vulnerable parameters.

Long-Term Security Practices

Implement stringent input validation mechanisms and regularly update the ad server software to prevent security loopholes.

Patching and Updates

Stay informed about security updates from Revive Adserver and promptly apply patches to ensure the continued security of the system.