A vulnerability was discovered in Elastic's Elasticsearch that allows for the insecure storage of private keys. Specifically, when the elasticsearch-certutil CLI tool is used with the csr option to create new Certificate Signing Requests, the generated private key is stored unencrypted on disk, even when the --pass parameter is included in the command.
This vulnerability carries a CVSS score of 4.9, classified as medium severity. Its implications could result in unauthorized access to sensitive cryptographic material. Organizations utilizing affected versions of Elasticsearch should take note of the potential risk this vulnerability poses.
With a high confidentiality impact but no integrity or availability impact, the vulnerability can allow attackers to retrieve private keys, which could then be exploited to impersonate services or users. Given the nature of this vulnerability, organizations should prioritize addressing it in their security patch cycles.
As of now, there are no known exploits in the wild, but the potential for exploitation exists. The urgency for defenders to act cannot be overstated, as leaving this vulnerability unaddressed could have detrimental effects on the security posture of organizations.
Vulnerability Details
CVE-2024-23444 describes a vulnerability found in the Elasticsearch product developed by Elastic. The issue arises from the improper handling of private keys generated by the elasticsearch-certutil CLI tool.
The CVSS score of 4.9 indicates a medium severity level, reflecting the vulnerability's potential to compromise confidentiality. It is classified under CWE-311, which pertains to the failure to encrypt sensitive data.
The vulnerability affects versions of Elasticsearch from 7.0.0 up to, but not including, 7.17.23, as well as from 8.0.0 up to, but not including, 8.13.0. Organizations should ensure they are aware of their current Elasticsearch versions and take appropriate action.
Technical Analysis
The root cause of this vulnerability lies in the design of the elasticsearch-certutil CLI tool, which inadvertently stores private keys in an unencrypted format. This occurs regardless of whether a passphrase is provided during the key generation process.
The attack vector is network-based (AV:N), with a low attack complexity (AC:L). This means that an attacker does not require special skills or elevated privileges to exploit the vulnerability, making it easier for unauthorized access to occur.
The privilege required is high (PR:H), indicating that an attacker would need a high level of access to initiate an attack. However, the user interaction required is none (UI:N), simplifying the attack process further.
The vulnerability impacts confidentiality (C:H) significantly, as the exposure of private keys can lead to unauthorized access to systems and data. Integrity and availability impacts remain unchanged (I:N, A:N), which suggests that while the private keys may be compromised, the integrity of the data and services is not directly affected.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to systems that utilize compromised private keys, potentially leading to data breaches or service disruptions. The blast radius could be significant, extending to any organization that relies on the affected versions of Elasticsearch.
Given the CVSS score of 4.9 and the absence of known exploits, organizations should still act promptly to mitigate the risk. The vulnerability’s inclusion in the CVE database highlights its relevance and potential impact within the cybersecurity landscape.
Organizations should prioritize patching immediately to prevent unauthorized access. Regular security assessments and monitoring should be part of the strategy to ensure that similar vulnerabilities do not arise in the future.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects Elasticsearch versions from 7.0.0 to 7.17.22 and from 8.0.0 to 8.12.9. Organizations should ensure they upgrade to the latest patched versions to mitigate this risk.
Mitigation & Remediation
Organizations should review the patch information provided by Elastic and upgrade to the recommended versions to eliminate this vulnerability. In the absence of immediate patching, consider implementing configuration hardening measures to limit access to the CLI tool.
Regular security assessments and monitoring can help in identifying similar weaknesses. Organizations should validate remediation through continuous security testing to ensure robust security posture.
Detection Guidance
Monitor logs for unexpected access to the elasticsearch-certutil CLI tool and any attempts to create Certificate Signing Requests without proper controls. Behavioral anomalies around cryptographic key generation should be logged and investigated.
AppSecure Threat Intelligence Insight
This vulnerability highlights the critical importance of secure key management practices within organizations. As the threat landscape evolves, the potential for similar vulnerabilities to surface remains high.
Organizations should take proactive steps to enhance their security frameworks, focusing on incident response and vulnerability management. For more insights on vulnerability management, see our article on vulnerability management programs. Additionally, leveraging insights from penetration testing methodologies can aid in identifying gaps in security measures.
Furthermore, understanding the trends in the cybersecurity landscape can be beneficial. For more information, refer to our latest reports on vulnerability exposure severity trends and ransomware statistics to stay informed on emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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