CVE-2022-41724 represents a high-severity vulnerability in Golang’s Go programming language, particularly affecting the crypto/tls package. This vulnerability allows large TLS handshake records to cause panics, impacting both clients and servers. Specifically, TLS 1.3 clients, TLS 1.2 clients that enable session resumption, and TLS 1.3 servers requesting client certificates are affected. The CVSS score for this vulnerability is 7.5, indicating a high level of risk to organizations. As such, organizations should prioritize patching immediately to prevent potential disruptions.
The risk to organizations includes potential service outages due to panic situations when handling large handshake records, which can disrupt the TLS communication process. This vulnerability is classified under CWE-400, indicating a potential for resource exhaustion. Given its impact on availability, swift action is necessary to mitigate associated risks.
Currently, there is no known public exploit for this vulnerability, and it has not been listed in the Known Exploited Vulnerabilities (KEV) catalog. Organizations should be vigilant, however, as the nature of this vulnerability may pose risks if left unaddressed.
Organizations utilizing affected versions of Golang should take immediate action to update their systems, as the urgency for remediation aligns with the high CVSS score. The recommended versions to upgrade to are available through vendor patches.
Vulnerability Details
The official description of this vulnerability highlights that large handshake records may cause panics in the crypto/tls components of Golang. Clients and servers can send large TLS handshake records, leading to panic situations when responses are constructed. This impacts all TLS 1.3 clients and TLS 1.2 clients that enable session resumption by setting Config.ClientSessionCache to a non-nil value, as well as TLS 1.3 servers that request client certificates by setting Config.ClientAuth >= RequestClientCert.
The CVSS score assigned to this vulnerability is 7.5, indicating a high severity level. The attack vector is classified as NETWORK, with a low complexity for exploitation. No privileges or user interaction are required for an attacker to exploit this vulnerability, while the availability impact is marked as high, indicating significant potential disruption.
The affected product is Golang's Go, with specific configurations being vulnerable. All versions prior to Go 1.19.6 are susceptible, as well as specific release candidates of version 1.20.0.
Technical Analysis
The root cause of this vulnerability stems from the handling of large TLS handshake records in the crypto/tls package. When either a client or server attempts to process excessively large handshake records, it results in panic situations, causing the application to crash or become unresponsive.
The attack vector is network-based, allowing an attacker to send maliciously crafted handshake records without the need for physical access to the system. The attack complexity is low, making it easier for potential attackers to exploit this vulnerability. No privileges are required to carry out the attack, and user interaction is not necessary.
In terms of impact, the vulnerability impacts availability, as the panic caused can lead to system crashes, resulting in downtime for services relying on the affected components. Confidentiality and integrity are not directly impacted, as the vulnerability does not involve unauthorized access or data manipulation.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2022-41724 is significant, particularly for organizations that rely heavily on TLS for secure communications. The potential for service disruptions due to panics in the crypto/tls package can lead to loss of availability, which may affect business operations and user trust.
Organizations should evaluate their usage of Golang's Go and the crypto/tls package, especially in production environments. The blast radius of this vulnerability is considerable, as it can affect any service utilizing the vulnerable versions of Go, leading to widespread availability issues.
Organizations should prioritize remediation based on the CVSS score and the urgency associated with this vulnerability. The availability impact suggests that patching should be addressed in the immediate patch cycle to mitigate risks effectively.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Golang's Go include all versions prior to 1.19.6, as well as specific release candidates of version 1.20.0. Organizations should ensure they upgrade to the latest patched versions to mitigate risks associated with this vulnerability.
Mitigation & Remediation
Organizations should ensure they are running the latest patched versions of Golang’s Go to address this vulnerability. The recommended patch is version 1.20.1 or later. If immediate patching is not possible, organizations should implement configuration hardening to limit the impact of large handshake records and monitor affected systems closely.
For ongoing protection, organizations might consider engaging in penetration testing to identify similar weaknesses in their systems.
Detection Guidance
Organizations should monitor logs for any anomalies in TLS handshake processes, particularly unexpected panics or crashes in the crypto/tls package, which could indicate attempts to exploit this vulnerability. Behavioral anomalies in client-server communication may also serve as indicators of compromise.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-41724 highlights the importance of secure handling of TLS communications. As organizations increasingly rely on secure connections, vulnerabilities like this can represent larger patterns of risk within application security frameworks. Security teams must prioritize proactive measures, including regular updates and thorough testing of cryptographic libraries.
To enhance security posture, organizations should consider adopting a comprehensive vulnerability management program that includes regular security assessments and code reviews.
Finally, staying informed about emerging threats through continuous education and training is essential. Organizations can benefit from penetration testing methodology to strengthen their defenses against similar vulnerabilities in the future.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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