An issue in AsyncSSH before 2.14.1 allows attackers to control the extension info message (RFC 8308) via a man-in-the-middle attack, aka a "Rogue Extension Negotiation." This vulnerability has a CVSS score of 5.9, classifying it as medium severity. The potential for exploitation exists, and organizations using this software must take it seriously.
The nature of this vulnerability allows attackers to manipulate communication in a way that can severely affect the integrity of the data being transmitted. Given its medium severity, the risk to organizations includes unauthorized access to sensitive information or alteration of data integrity, which could lead to further exploitation.
Currently, there is no public exploit confirmed, but the risk remains high due to the nature of the flaw. Organizations should prioritize patching immediately to safeguard against potential threats stemming from this vulnerability.
As the threat landscape continues to evolve, it is crucial for organizations to stay vigilant and proactive in addressing vulnerabilities like CVE-2023-46445. Regular assessments and timely updates can help mitigate risks and protect critical assets.
Vulnerability Details
The vulnerability in AsyncSSH affects versions prior to 2.14.1. The official CVE description states that it allows attackers to control the extension info message through a man-in-the-middle attack. The vulnerability has been assigned a CVSS score of 5.9, indicating a medium severity level, which signifies a moderate impact on confidentiality, integrity, and availability.
The attack vector is classified as network-based, meaning that it can be exploited remotely without requiring physical access. There is no need for user interaction or specific privileges to carry out the attack, making it particularly concerning for organizations relying on this software.
The vulnerability falls under CWE-345, which refers to "Insufficient Verification of Data Authenticity." This classification highlights the underlying issue of inadequate measures to ensure the integrity of the data being processed.
Technical Analysis
The root cause of this vulnerability lies in the way AsyncSSH handles extension negotiation messages. Attackers may exploit this weakness through a man-in-the-middle attack, allowing them to manipulate the messages exchanged between the client and server.
The attack complexity is rated as high, meaning that it requires a significant level of expertise and resources to successfully exploit the vulnerability. However, the lack of required privileges and user interaction lowers the barrier for attackers who possess the necessary skills.
In terms of impact, the confidentiality of the data is not affected, but the integrity is significantly compromised. Attackers may alter messages without detection, leading to potential data manipulation and misuse.
Risk & Impact Analysis
The real-world risk associated with CVE-2023-46445 is substantial, particularly for organizations that depend on AsyncSSH for secure communications. The ability to control extension messages can lead to unauthorized access or data manipulation, which can have severe repercussions.
Organizations should evaluate the potential blast radius of this vulnerability. Given that AsyncSSH may be integrated into various systems and applications, the impact could extend beyond the immediate environment, affecting interconnected systems and compromising multiple layers of security.
With a CVSS score of 5.9, this vulnerability should be addressed during the next patch cycle. Organizations must prioritize remediation efforts to reduce the likelihood of exploitation and maintain the integrity of their systems.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of AsyncSSH prior to 2.14.1 are affected by this vulnerability. Organizations using older versions should consider upgrading to the latest version to mitigate risks.
Mitigation & Remediation
Organizations should patch AsyncSSH to version 2.14.1 or later. If an immediate patch is not available, consider implementing network controls to limit access to affected systems and monitor communication patterns for suspicious activity.
Configuration hardening is also recommended to reduce exposure. Regularly reviewing and updating security policies can further enhance protection against such vulnerabilities.
Penetration testing can help identify other potential vulnerabilities in the system.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual connection attempts or changes in communication patterns. Behavioral anomalies in SSH sessions can indicate an ongoing attack.
Network signatures should be updated to flag suspicious traffic associated with SSH communications. Regular audits of configurations can help ensure security controls are properly enforced.
AppSecure Threat Intelligence Insight
CVE-2023-46445 represents a significant concern for organizations relying on AsyncSSH, illustrating the importance of maintaining up-to-date software to protect against vulnerabilities. The trend of vulnerabilities in communication protocols is a reminder for security teams to prioritize regular updates and patch management as part of their defense strategy.
To enhance security posture, organizations should adopt a comprehensive vulnerability management program that includes proactive measures such as vulnerability assessments and incident response planning.
Awareness and training for development teams on secure coding practices can mitigate the introduction of vulnerabilities in the first place. Additionally, employing penetration testing can uncover potential weaknesses before they can be exploited.
Lastly, organizations should leverage threat intelligence to remain informed about emerging vulnerabilities and potential exploitation patterns.
Known Exploitation Timeline
This vulnerability is not included in the Known Exploited Vulnerabilities (KEV) catalog, indicating that there are currently no confirmed reports of active exploitation in the wild.
Affected Versions
Organizations are advised to upgrade to AsyncSSH version 2.14.1 or later to mitigate risks associated with this vulnerability.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)