CVE-2025-32023 is a high-severity vulnerability affecting Redis, an open-source, in-memory database that persists on disk. The vulnerability exists in versions from 2.8 up to, but not including, version 8.0.3, as well as specific versions 7.4.5, 7.2.10, and 6.2.19. An authenticated user can exploit this vulnerability by using a specially crafted string to trigger a stack or heap out-of-bounds write during hyperloglog operations, potentially leading to remote code execution. This issue poses a significant risk as it could allow attackers to execute arbitrary code on the server.
The vulnerability is classified with a CVSS score of 7.0, indicating high severity. Organizations using vulnerable versions of Redis are at risk, particularly if they allow untrusted authenticated users to perform hyperloglog operations. Given the potential impact, organizations should prioritize patching immediately.
The vulnerability was published on July 7, 2025, and is included in the current security advisories. Affected organizations should be aware of the urgency in addressing this vulnerability to prevent exploitation. Redis has released patches for the affected versions, and it is essential to upgrade to version 8.0.3 or later or the specified patched versions.
In addition to patching, a workaround is available for those unable to apply the update immediately. Organizations can configure ACL (Access Control List) settings to restrict the execution of hyperloglog commands, thereby mitigating the risk of exploitation until a patch can be applied.
It is crucial to monitor Redis deployments closely for any signs of exploitation and to ensure that proper security measures are in place to protect against potential attacks.
Vulnerability Details
This vulnerability allows an authenticated user to exploit hyperloglog operations, leading to remote code execution. The CVSS score reflects the severity of potential impacts, including confidentiality, integrity, and availability, all rated as high. The affected products are various versions of Redis as specified, and the vulnerability was disclosed in mid-2025.
Technical Analysis
The root cause of CVE-2025-32023 is an out-of-bounds write vulnerability that occurs during hyperloglog operations. The attack vector is local, requiring an authenticated user to exploit the vulnerability. The attack complexity is rated as high due to the specific conditions required for exploitation. Low privileges are required to execute the vulnerable commands, and no user interaction is needed. This vulnerability impacts confidentiality, integrity, and availability, making it critical for organizations to assess their risk posture.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access and control over Redis instances, which could lead to significant data breaches and system compromise. The blast radius could be extensive, affecting other services and data managed by Redis. Given the CVSS score of 7.0, organizations should address this vulnerability in their priority patch cycle to mitigate risks effectively.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Redis from 2.8 to before 8.0.3, including 7.4.5, 7.2.10, and 6.2.19, are affected. Organizations should upgrade to version 8.0.3 or the patched versions 7.4.5, 7.2.10, and 6.2.19 to mitigate this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching immediately. Upgrading to Redis version 8.0.3 or later is essential. If immediate patching is not feasible, implementing ACL to restrict hyperloglog commands can serve as a workaround until the patch is applied. For further guidance on security testing, organizations should consider engaging in penetration testing to assess their security posture.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual commands related to hyperloglog operations. Behavioral anomalies from authenticated users executing unexpected commands should be flagged for review. Network signatures should be established to identify any malicious activity targeting Redis instances.
AppSecure Threat Intelligence Insight
CVE-2025-32023 highlights the necessity for organizations to maintain vigilance against vulnerabilities that can lead to remote code execution. The increasing complexity of vulnerabilities necessitates the implementation of robust security measures and regular updates to prevent exploitation. Security teams should consider reviewing their penetration testing methodology to enhance their defense strategies against similar vulnerabilities. The trend of exploiting such vulnerabilities demonstrates the importance of proactive security assessments.
Organizations should also focus on establishing a comprehensive vulnerability management program to ensure that all systems are regularly assessed and patched against known vulnerabilities.
Finally, maintaining awareness of the latest security threats and trends will empower organizations to effectively defend against emerging vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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