CVE-2021-38561 refers to a high-severity vulnerability in the golang.org/x/text/language component. This vulnerability allows an out-of-bounds read during the parsing of BCP 47 language tags. The issue arises due to mishandling of index calculations, which can lead to a panic when processing untrusted user input. This behavior can be exploited to perform a denial-of-service (DoS) attack, making it critical for organizations utilizing this component to understand its implications.
The CVSS score for this vulnerability is 7.5, indicating a high severity level. The vulnerability is network-exploitable with low attack complexity, meaning that attackers can exploit it without requiring significant technical skill. Given the potential for causing service disruptions, organizations should prioritize patching this vulnerability.
As of now, there is no known public exploit available for CVE-2021-38561, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the presence of this vulnerability poses a significant risk to systems relying on the affected version of the golang text library.
Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability.
Vulnerability Details
The official description of CVE-2021-38561 points out that the vulnerability exists in the golang.org/x/text/language library prior to version 0.3.7. It is classified under CWE-125, indicating an issue related to out-of-bounds access. The vulnerability was published on December 26, 2022, and has since been modified, which highlights the evolving nature of vulnerabilities.
The attack vector for this vulnerability is network-based, and it requires no user interaction or privileges to exploit. The impacts are significant, with a high availability impact, which reinforces the necessity for immediate remediation.
Technical Analysis
The root cause of CVE-2021-38561 stems from the mishandling of index calculations in the language tag parsing. Attackers may leverage this flaw to cause a panic in the application, leading to service unavailability. The attack vector is through the network, meaning that no local access is required for exploitation. The complexity of the attack is low, making it easily exploitable by attackers with minimal resources.
In terms of impact, the vulnerability has no confidentiality or integrity impact, but it does pose a high availability risk. This means systems can be rendered unavailable through exploitation, affecting user access and overall service reliability.
Risk & Impact Analysis
Organizations deploying the golang text library should be acutely aware of the risks associated with CVE-2021-38561. The potential for denial-of-service attacks can disrupt operations and damage service reliability. Given that the vulnerability allows for high availability impact, organizations must assess their exposure and implement necessary safeguards.
The urgency of addressing this vulnerability is underscored by its CVSS score of 7.5. Organizations should take immediate steps to patch their systems and ensure they are running versions that mitigate this vulnerability. Regular vulnerability assessments can further assist in identifying risks and enhancing security posture.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version for this vulnerability is all versions of the golang text component prior to 0.3.7. Organizations using these versions should upgrade to the latest version to ensure security.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the latest patches available for the golang text library. Upgrading to version 0.3.7 or later is essential to close this vulnerability. If immediate patching is not feasible, organizations should consider implementing input validation and sanitization mechanisms to mitigate potential exploitation.
For effective risk management, organizations may also benefit from considering penetration testing services. These services can help identify similar vulnerabilities in the infrastructure.
penetration testing to validate the effectiveness of mitigations.
Detection Guidance
Organizations should monitor logs for indicators of improper input handling or service disruptions that could be indicative of exploitation attempts related to CVE-2021-38561. Behavioral anomalies should also be investigated to identify potential attacks leveraging this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-38561 lies in its representation of the risks associated with mishandling user input in software libraries. This vulnerability serves as a reminder of the importance of robust input validation and error handling. Security teams should take note of this trend and integrate lessons learned into their development practices.
In light of this vulnerability, organizations are encouraged to review their security testing methodologies. Effective security practices, such as regular vulnerability assessments and continuous monitoring, can help identify and mitigate vulnerabilities before they are exploited.
To enhance security posture, organizations should evaluate their existing security measures and incorporate best practices for secure coding and application security. For further guidance, consider reviewing our resources on penetration testing methodology and vulnerability management programs to strengthen defenses.
Overall, CVE-2021-38561 highlights the ongoing need for vigilance in software security, particularly in libraries that handle user input.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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