CVE-2021-20376 Explained : Impact and Mitigation
Discover how CVE-2021-20376 in IBM Sterling File Gateway versions 2.2.0.0 through 6.1.1.0 could enable authenticated attackers to enumerate usernames. Learn the impact and mitigation steps here.
IBM Sterling File Gateway versions 2.2.0.0 through 6.1.1.0 has a vulnerability that could allow an authenticated attacker to enumerate usernames. This CVE was published on October 6, 2021.
Understanding CVE-2021-20376
This section will provide insights into the nature of the vulnerability and its potential impact.
What is CVE-2021-20376?
IBM Sterling File Gateway versions 2.2.0.0 through 6.1.1.0 are susceptible to user enumeration by authenticated attackers due to observable discrepancies in returned messages, as identified by IBM X-Force ID: 195568.
The Impact of CVE-2021-20376
The vulnerability presents a medium severity risk, with low attack complexity and confidentiality impact. An attacker could exploit this to obtain sensitive information, posing a potential threat.
Technical Details of CVE-2021-20376
Here, we delve into the specifics of the vulnerability, including affected systems, exploitation mechanisms, and more.
Vulnerability Description
The flaw in IBM Sterling File Gateway versions allows authenticated attackers to infer valid usernames through inconsistencies in response messages, creating a potential security loophole.
Affected Systems and Versions
The impacted versions range from 2.2.0.0 to 6.1.1.0 of IBM Sterling File Gateway, encompassing releases like 5.2.6.5_3, 6.0.3.4, and others.
Exploitation Mechanism
By leveraging the observable discrepancies in returned messages, an authenticated attacker could enumerate valid usernames, escalating the risk of unauthorized access.
Mitigation and Prevention
This section outlines actionable steps to address and mitigate the risks posed by CVE-2021-20376.
Immediate Steps to Take
IBM advises users to apply the official fix provided by the vendor to address this vulnerability promptly and prevent potential misuse.
Long-Term Security Practices
In addition to immediate patching, implementing robust authentication mechanisms and user input validation practices can enhance overall security posture.
Patching and Updates
Regularly monitoring vendor security bulletins and promptly applying patches and updates can help organizations stay resilient against emerging threats.