CVE-2023-0286 is a high-severity vulnerability found in OpenSSL that involves a type confusion relating to the processing of X.400 addresses. This vulnerability allows attackers to exploit certain conditions when Certificate Revocation List (CRL) checking is enabled. When the application sets the X509_V_FLAG_CRL_CHECK flag, an attacker can pass arbitrary pointers to a memcmp call, which can lead to unauthorized memory access or denial of service.
The vulnerability's CVSS score is 7.4, indicating it poses a significant risk to organizations. Attackers may leverage this vulnerability to read sensitive memory contents, particularly in applications that implement their own functionality for retrieving CRLs over a network. This means that the attack vector is primarily network-based, and successful exploitation may result in high confidentiality and availability impacts.
Currently, there are no public exploits confirmed for this vulnerability, and it is not part of the Known Exploited Vulnerabilities (KEV) catalog. However, organizations using affected versions of OpenSSL should prioritize remediation, as the risk remains significant.
Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability.
Vulnerability Details
The vulnerability allows for type confusion related to X.400 address processing within an X.509 GeneralName. The specific issue arises from the misclassification of the x400Address field, causing it to be interpreted incorrectly. When certificate revocation checking is enabled, this can lead to serious security implications.
The CVSS score of 7.4 categorizes this vulnerability as high severity, indicating that it requires immediate attention from affected organizations.
Technical Analysis
The root cause of CVE-2023-0286 is a flaw in how OpenSSL processes X.400 addresses within the X.509 structure. The attack vector is network-based, with high attack complexity due to the requirement of controlling both the certificate chain and the CRL. No user interaction is necessary, and the attacker needs no privileges to exploit this vulnerability.
Successful exploitation could lead to high confidentiality impact and significant availability issues, making this a critical vulnerability for any organization utilizing affected versions of OpenSSL.
Risk & Impact Analysis
The risk to organizations includes unauthorized access to memory contents, which can lead to sensitive information exposure or service disruptions. The potential for exploitation in applications that utilize OpenSSL for cryptographic operations highlights the urgency of addressing this vulnerability.
Given the high severity score and the potential impact, organizations should address this vulnerability in their priority patch cycle. Failure to do so may expose critical systems to attacks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions are affected by this vulnerability:
OpenSSL versions 1.0.2 (up to but not including 1.0.2zg), 1.1.1 (up to but not including 1.1.1t), and 3.0.0 (up to but not including 3.0.8) are vulnerable.
Mitigation & Remediation
Organizations should implement patches as soon as possible to address this vulnerability. Upgrading to the latest versions of OpenSSL that fix this vulnerability is crucial. For those unable to upgrade immediately, consider implementing stringent network controls and monitoring to detect potential exploits.
For more information on remediation strategies, organizations can refer to the penetration testing services that help validate security posture against similar vulnerabilities.
Detection Guidance
Monitoring the use of X.400 addresses in certificate processing logs can provide indicators of potential exploitation. Organizations should look for anomalies in memory access patterns and unusual certificate chain requests.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-0286 lies in its representation of the risks associated with improper data type handling in cryptographic libraries. Security teams should learn from this incident to improve their review processes for cryptographic implementations.
This vulnerability highlights the importance of maintaining up-to-date libraries and conducting regular security assessments. Organizations can strengthen their defenses by implementing a comprehensive penetration testing methodology to evaluate their security posture against similar vulnerabilities.
Engagement with professional security services can provide additional insights into vulnerabilities like CVE-2023-0286, offering organizations tailored recommendations for their specific environments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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