CVE-2025-56007: Medium Vulnerability in Keenetic KeeneticOS

A CRLF-injection vulnerability in KeeneticOS prior to version 4.3 has been identified at the "/auth" API endpoint. This vulnerability allows attackers to take over the device by adding additional users with full permissions, contingent upon the victim being directed to a malicious page. With a CVSS score of 6.5, this vulnerability is classified as medium severity, indicating a substantial risk if exploited.

The exploitation of this vulnerability is particularly concerning because it requires user interaction, meaning that attackers may trick users into opening a malicious link. The potential for unauthorized access to sensitive device functions poses a significant threat to users of KeeneticOS.

Risk to organizations includes unauthorized device control and the potential for further exploitation within the network. Organizations should prioritize patching immediately to mitigate the risk this vulnerability poses.

As of now, there are no confirmed publicly available exploits for this vulnerability, but the nature of CRLF injection vulnerabilities suggests that they could be leveraged in various attack scenarios. It is imperative for security teams to stay vigilant and monitor their systems.

Vulnerability Details

The vulnerability allows for CRLF-injection in KeeneticOS prior to version 4.3 at the "/auth" API endpoint. This allows attackers to take over the device via adding additional users with full permissions. The official CVE description highlights the critical nature of this risk.

According to the CVSS score of 6.5, the attack vector is classified as network-based with low attack complexity, requiring no privileges and user interaction. The integrity and confidentiality impacts are marked as none, while the availability impact is high, meaning that successful exploitation could lead to significant service disruptions.

Technical Analysis

The root cause of this vulnerability lies in the improper handling of CRLF characters within the API. This flaw allows attackers to manipulate the HTTP response headers by injecting additional headers into the response. The attack vector for this vulnerability is network-based, and the attack complexity is low, meaning that an attacker does not require advanced skills to exploit this vulnerability.

No special privileges are required to exploit this vulnerability, but user interaction is necessary, as the victim must be tricked into visiting a malicious link. The availability impact is high, which means successful exploitation could lead to significant downtime or loss of service.

Risk & Impact Analysis

The risk posed by this vulnerability is significant, particularly for organizations relying on KeeneticOS devices. If exploited, attackers could gain unauthorized access to the device, potentially leading to further vulnerabilities within the network. This could allow for lateral movement and additional attacks on internal resources.

The blast radius of this vulnerability could extend beyond the affected device, making it critical for organizations to evaluate their exposure and take appropriate actions to safeguard their environments. Given the medium CVSS score and the lack of known exploits, organizations should address this vulnerability in their priority patch cycle.

The urgency for remediation is heightened by the potential for user interaction in exploitation. Organizations must ensure that users are educated about the risks associated with this vulnerability and the importance of not clicking on suspicious links.

Affected Versions

All versions of KeeneticOS prior to version 4.3 are affected by this vulnerability. Organizations using these versions should ensure they upgrade to the latest version to mitigate the risk.

Mitigation & Remediation

Organizations should prioritize applying patches for KeeneticOS to version 4.3 or later. If patches are not available, consider implementing workarounds such as disabling the affected API endpoint or restricting access to trusted users only.

Additionally, organizations should conduct configuration hardening and apply network controls to limit exposure to potential attackers. Monitoring for unusual activity and educating users about the risks of clicking on untrusted links will further help mitigate the risk.

For ongoing security assurance, organizations may consider employing penetration testing to identify potential weaknesses.

Detection Guidance

To detect any potential exploitation of this vulnerability, organizations should monitor logs for indicators of unauthorized access attempts or unusual activity on the affected API endpoint. Behavioral anomalies such as unexpected account creation requests should also be watched closely.

Network signatures can be established to detect malicious requests targeting the "/auth" API endpoint, aiding in early detection of attempts to exploit this vulnerability.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability lies in its potential to serve as a gateway for attackers aiming to exploit vulnerabilities in connected systems. The pattern of CRLF injection attacks reflects a common weakness exploited by attackers, underscoring the need for robust security practices.

Security teams should be vigilant and implement comprehensive security assessments to identify and address vulnerabilities proactively. For additional insights on vulnerability management, refer to our guide on vulnerability management programs, which outlines best practices for maintaining a secure environment.

Moreover, organizations should enhance their defenses through regular penetration testing to simulate potential attacks and identify gaps in security.

In conclusion, addressing the CRLF-injection vulnerability in KeeneticOS is critical for maintaining the integrity and security of networked devices. Continuous monitoring, patching, and user education will be vital in mitigating the risks associated with this vulnerability.