CVE-2022-41725 is a high-severity denial of service vulnerability affecting the Golang programming language, specifically within the net/http and mime/multipart libraries. This vulnerability arises from excessive resource consumption during multipart form parsing, which can lead to significant memory and disk usage. The potential impact is substantial, as the flaw allows crafted requests capable of consuming more than the documented limits, leading to a denial of service condition.
The CVSS score for this vulnerability is 7.5, classified as high severity, indicating that organizations should prioritize immediate remediation efforts. This vulnerability is particularly concerning given its nature, as it can be exploited remotely without requiring authentication or user interaction, thereby posing a significant risk to organizations using affected versions of Golang.
Organizations utilizing the affected components need to address this vulnerability promptly. The attack vector is network-based, and the complexity of exploiting the vulnerability is low, making it accessible for attackers. It's crucial for defenders to recognize the urgency of patching their systems and to implement necessary mitigations as outlined in the remediation section.
As of now, there is no confirmed public exploit or proof of concept available, but the nature of the vulnerability suggests that it could be leveraged by attackers if left unaddressed. Organizations must remain vigilant and proactive in applying the necessary patches.
Organizations should prioritize patching immediately.
Vulnerability Details
This vulnerability allows denial of service through excessive resource consumption in the net/http and mime/multipart libraries. The multipart form parsing functionality, specifically through mime/multipart.Reader.ReadForm, can consume largely unlimited amounts of memory and disk space due to unaccounted overhead for parsed form elements.
The vulnerability is classified as CWE-770, indicating a failure to limit resource consumption. The CVSS 3.1 score of 7.5 signifies a high level of severity, with availability impact being the primary concern. The vulnerability affects all versions of Golang prior to 1.19.6, along with 1.20.0 release candidates.
The vulnerability was published on February 28, 2023, and has since been modified to address the underlying issues with the ReadForm method. The documentation has been updated to clarify the limits and potential hazards associated with its use.
Technical Analysis
The root cause of the vulnerability stems from the design of the ReadForm method within the mime/multipart package, which failed to properly account for memory consumption from data structures and overhead associated with parsed multipart forms. The attack vector is network-based, allowing an attacker to send crafted requests that exploit this weakness.
The attack complexity is low, as no special privileges are required to exploit it, and user interaction is not necessary. This makes the vulnerability particularly dangerous in environments where untrusted input is processed. The availability impact is rated as high, indicating that successful exploitation can result in significant denial of service conditions.
In addition, there is no limit on the number of temporary disk files created, which can further exacerbate the resource consumption issue. While mitigations have been introduced in updated versions, including improved accounting for memory overhead and limiting the number of disk files to one, users are still advised to monitor their applications for signs of excessive resource usage.
Risk & Impact Analysis
The real-world risk associated with CVE-2022-41725 is significant. As this vulnerability allows attackers to consume excessive resources, the potential for denial of service attacks is high. Organizations that rely on Golang for web services or APIs may face outages or degraded performance due to this vulnerability.
The blast radius is broad as it affects any application using the vulnerable versions of Golang's net/http and mime/multipart libraries. Given the high CVSS score, organizations are urged to assess their exposure and prioritize remediation efforts.
Urgency for remediation is classified as high, with organizations needing to implement patches as part of their immediate response to this vulnerability. It is crucial to evaluate existing applications for potential impacts and ensure that updated versions of Golang are deployed.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects all versions of Golang prior to 1.19.6 and the 1.20.0 release candidates. Users should upgrade to the latest stable version to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to Golang version 1.19.6 or later. Additionally, users should consider implementing monitoring mechanisms for resource consumption in applications that utilize multipart form processing.
If immediate upgrading is not possible, organizations may limit the size of incoming form data using the http.MaxBytesReader function. This can help mitigate the risk of excessive resource consumption until a proper patch is applied.
Continuous penetration testing should also be considered to identify any further vulnerabilities that may exist within the application.
Detection Guidance
Organizations should monitor their applications for unusual resource usage patterns, particularly during multipart form submissions. Log indicators such as memory usage spikes and extensive temporary file creation can signal potential exploitation attempts.
Behavioral anomalies in resource consumption should prompt further investigation. Additionally, monitoring for requests with unusually large multipart forms can help detect potential abuse.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-41725 highlights the necessity for robust resource limits in application design. This vulnerability represents a pattern of resource exhaustion issues commonly seen in web applications that process user input.
Security teams must learn from this case to ensure that applications are designed with strict resource limits and comprehensive validation of user inputs. Regular reviews of application code and libraries can help prevent similar vulnerabilities from being introduced in the future.
In conclusion, organizations should prioritize the implementation of security best practices, including vulnerability management programs and continuous security assessments to mitigate risks associated with vulnerabilities like CVE-2022-41725.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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