Redis, an open-source in-memory database known for its high performance and persistence capabilities, has been identified with a high-severity vulnerability. Specifically, versions 8.2.1 and below are susceptible to an integer overflow vulnerability that can be triggered by authenticated users via specially crafted Lua scripts. This vulnerability allows for potential remote code execution, making it critical for organizations utilizing Redis to address this issue immediately.
The CVSS score for this vulnerability is 7, indicating it is classified as high severity. The risk to organizations includes unauthorized access and manipulation of data, which could severely impact the integrity and confidentiality of stored information. With the potential for exploitation confirmed, organizations should prioritize patching immediately.
This vulnerability exists in all Redis versions that support Lua scripting and has been officially addressed in version 8.2.2. As the issue has been analyzed and an exploit is available, it is of utmost importance that organizations review their Redis installations and apply the necessary updates to mitigate risks.
Organizations that fail to apply the patch risk being targeted by attackers leveraging this vulnerability for malicious purposes. Therefore, immediate attention to this issue is essential for maintaining the security posture of Redis deployments.
Vulnerability Details
The official description of this vulnerability states: 'Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to cause an integer overflow and potentially lead to remote code execution. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2.'
The vulnerability has been classified under CWE-190, which pertains to integer overflow. The CVSS score of 7 indicates the severity of the issue, and it is crucial for organizations to recognize the potential impacts of a successful exploitation.
Technical Analysis
The root cause of this vulnerability stems from the handling of Lua scripts within Redis. Specifically, the integer overflow can occur when an authenticated user executes a specially crafted script that exceeds the allowable range of integer values. This may lead to unexpected behaviors and, in the worst-case scenario, remote code execution.
The attack vector for this vulnerability is classified as local, meaning that an attacker must have authenticated access to the Redis instance to exploit the vulnerability. The attack complexity is considered high, as it requires knowledge of Lua scripting and the specific conditions that would allow for an overflow to occur.
Privileged access is required for the script execution, but no user interaction is necessary. If successfully exploited, this vulnerability may lead to high impacts on confidentiality, integrity, and availability of the Redis service and the data it manages.
Risk & Impact Analysis
Organizations that utilize Redis should be aware of the substantial risks posed by this vulnerability. The ability for an authenticated user to exploit an integer overflow to achieve remote code execution presents a significant threat, especially in environments where Redis is used to manage sensitive data or critical applications.
The potential blast radius of this vulnerability includes all instances of Redis running vulnerable versions, which can lead to unauthorized access and manipulation of data across various applications. The urgency for organizations to address this vulnerability is high, given the readily available exploit and the confirmed existence of public proof-of-concept scripts.
Organizations should prioritize patching immediately to mitigate the risk of exploitation and protect the integrity of their systems. Implementing robust monitoring and access controls can further reduce the likelihood of successful attacks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Redis versions 8.2.1 and below are affected. This includes all versions from 6.0.0 to 8.2.1. The vulnerability is fixed in version 8.2.2.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade to Redis version 8.2.2 or later. If the patch is not immediately feasible, consider implementing strict access controls to limit Lua script execution only to trusted users. Additionally, monitoring for abnormal Lua script executions can help detect potential exploitation attempts.
For detailed guidance on penetration testing, organizations can refer to penetration testing services to validate the effectiveness of their security measures.
Detection Guidance
Organizations should monitor logs for unusual Lua script executions and look for signs of unauthorized access attempts. Behavioral anomalies, such as unexpected script execution patterns, should be investigated promptly. Network signatures indicating attempts to exploit this vulnerability should also be flagged for further analysis.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-46817 lies in its demonstration of the risks associated with Lua scripting in database environments. As organizations increasingly rely on scripting for database functionality, the potential for exploitation through vulnerabilities like this one grows.
Security teams should take this opportunity to reassess their scripting capabilities and implement robust security measures to mitigate similar vulnerabilities. Organizations can benefit from a comprehensive vulnerability management program to ensure they remain ahead of potential threats.
Additionally, the pattern of vulnerabilities in popular database systems highlights the need for continuous security assessments. Engaging in proactive security measures, such as regular penetration testing, can help organizations identify and address vulnerabilities before they are exploited.
Lastly, with the evolving landscape of database security, organizations must stay informed about emerging threats and vulnerabilities. This includes subscribing to security advisories and engaging with the broader security community to share knowledge and insights.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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