CVE-2021-3654 is a medium severity vulnerability affecting OpenStack's nova component, specifically in the noVNC console proxy. This vulnerability allows attackers to craft malicious URLs that can redirect users to any desired URL, posing significant risks to user security and privacy. The CVSS score for this vulnerability is 6.1, indicating that while the threat is not critical, it should still be taken seriously due to its potential impact.
The exploitation of this vulnerability can result in unintended information disclosure and manipulation, particularly if users are redirected to phishing sites or malicious resources. Organizations using OpenStack should prioritize patching this vulnerability to prevent possible exploitation.
Given that this vulnerability has been publicly disclosed and is categorized as medium severity, organizations should address it promptly. It is essential for security teams to ensure that their OpenStack instances are updated to the latest versions to mitigate risks associated with this vulnerability.
According to the CVE Intelligence data, there is currently no public exploit available for this vulnerability, but the potential for exploitation exists, warranting immediate action from organizations.
Vulnerability Details
The vulnerability allows for open redirection in the noVNC proxy of OpenStack's nova component. It is classified under CWE-601, which pertains to URL Redirection to Untrusted Sites. The vulnerability was published on March 2, 2022, and has a CVSS 3.1 base score of 6.1, indicating a medium severity level.
The vulnerability affects multiple versions of the OpenStack nova component, including those prior to version 21.2.3 and those between versions 22.0.0 and 22.2.3. Additionally, it affects the Red Hat OpenStack Platform versions 16.1 and 16.2.
Technical Analysis
The root cause of CVE-2021-3654 lies in the implementation of the noVNC proxy within OpenStack nova, which does not adequately validate or sanitize URLs. This oversight permits attackers to craft a malicious URL that, when accessed, redirects the user to an attacker-controlled site.
The attack vector for this vulnerability is network-based, requiring user interaction to exploit. The complexity of the attack is considered low, as it does not require any special privileges or extensive preparations. Once the victim interacts with the malicious link, they may be redirected to harmful domains.
The impact on confidentiality and integrity is rated as low, meaning sensitive information could potentially be exposed or altered through the redirection. However, there is no impact on availability, as the service remains operational.
Risk & Impact Analysis
Risk to organizations includes potential data breaches and unauthorized access to sensitive information. The likelihood of exploitation increases if users are not aware of the malicious URLs they may encounter. The blast radius for this vulnerability is significant because it can affect any user interacting with the noVNC proxy, leading to widespread exposure.
Organizations should assess their deployment of OpenStack and review their security measures around user interactions with noVNC. Given the CVSS score and the potential for exploitation, organizations should address this vulnerability in their priority patch cycle.
The urgency for remediation is deemed medium, as organizations should patch this vulnerability to mitigate risks without causing significant disruption to their operations.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions of OpenStack nova and Red Hat OpenStack Platform are affected by CVE-2021-3654:
1. OpenStack nova versions prior to 21.2.3.
2. OpenStack nova versions from 22.0.0 to prior to 22.2.3.
3. OpenStack nova versions from 23.0.0 to prior to 23.0.3.
4. Red Hat OpenStack Platform versions 16.1 and 16.2.
Mitigation & Remediation
To mitigate CVE-2021-3654, organizations are advised to apply the latest patches provided by OpenStack and Red Hat. The specific versions to upgrade to include:
1. Upgrade OpenStack nova to version 21.2.3 or later.
2. Upgrade OpenStack nova to version 22.2.3 or later if on versions 22.0.0 to 22.2.3.
3. Upgrade OpenStack nova to version 23.0.3 or later if on versions 23.0.0 to 23.0.3.
If immediate patching is not possible, organizations should implement configuration hardening by restricting access to the noVNC service and monitoring user interactions for suspicious activities.
For further guidance on security testing, organizations can refer to our penetration testing services.
Detection Guidance
Organizations should monitor their logs for indicators of exploitation attempts related to CVE-2021-3654. Key detection guidance includes:
1. Look for unusual patterns in noVNC access logs, including requests to unauthorized URLs.
2. Monitor for behavioral anomalies that indicate attempts to redirect users.
3. Implement network signatures to detect and block known malicious URLs.
AppSecure Threat Intelligence Insight
CVE-2021-3654 is significant due to its potential for misuse in phishing attacks. Security teams should be aware of the trends associated with open redirection vulnerabilities, as they can serve as entry points for more severe attacks.
As organizations increasingly rely on cloud services, the exposure to such vulnerabilities emphasizes the need for robust security measures. Regular security assessments, including vulnerability management programs, can help identify and mitigate such risks.
Additionally, organizations should consider adopting a proactive approach to security by engaging in penetration testing to assess their defenses against such vulnerabilities.
In conclusion, CVE-2021-3654 serves as a reminder of the importance of maintaining vigilance and implementing security best practices to safeguard against potential threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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