CVE-2023-0216 is classified as a high-severity vulnerability with a CVSS score of 7.5. This vulnerability allows an invalid pointer dereference on read to be triggered when applications attempt to load malformed PKCS7 data using the d2i_PKCS7(), d2i_PKCS7_bio(), or d2i_PKCS7_fp() functions. The result of this dereference is an application crash, which could lead to a denial of service attack. Although the TLS implementation in OpenSSL does not directly call these functions, third-party applications may invoke them on untrusted data, increasing the risk to organizations.
Organizations using affected versions of OpenSSL or Stormshield Management Center should take immediate action. The vulnerability primarily affects versions of OpenSSL from 3.0.0 to 3.0.7 and certain versions of Stormshield Management Center prior to 3.3.3. Given the potential for denial of service, it is crucial for organizations to prioritize patching immediately.
The urgency for remediation stems from the high availability impact associated with this vulnerability. Attackers may leverage this flaw to disrupt services, and organizations must ensure their systems are safeguarded against such exploits.
As such, organizations should assess their use of OpenSSL and Stormshield Management Center, apply the necessary patches, and validate the effectiveness of these remediations.
Vulnerability Details
The official CVE description states that this vulnerability allows an invalid pointer dereference on read when an application tries to load malformed PKCS7 data with specific functions. The CVSS score of 7.5 indicates a high severity level, primarily due to the potential for significant availability impact.
The affected products include OpenSSL (versions 3.0.0 to 3.0.7) and Stormshield Management Center (versions prior to 3.3.3). The vulnerability was published on February 8, 2023, and is classified under CWE-476, which pertains to NULL Pointer Dereference.
Technical Analysis
This vulnerability results from improper handling of malformed PKCS7 data. Specifically, when the affected functions attempt to read data that does not conform to expected formats, an invalid pointer dereference occurs, leading to application crashes.
The attack vector is network-based, and the complexity is low, meaning that an attacker does not require any special privileges or user interaction to exploit this vulnerability. The only requirement is sending malformed data to one of the affected functions.
Given that there are no confidentiality or integrity impacts, the primary concern remains the high availability impact. Organizations should monitor for any signs of exploitation attempts on their systems.
Risk & Impact Analysis
The real-world risk associated with CVE-2023-0216 includes potential service disruptions that could affect operations and customer trust. The availability impact is rated as high, indicating that successful exploitation can lead to significant downtime, which may have financial repercussions.
Organizations utilizing OpenSSL or Stormshield Management Center must recognize the urgency of addressing this vulnerability. Given the ease of exploitation and the potential for widespread impacts, this vulnerability should be included in priority patch cycles.
Failure to remediate this vulnerability increases the blast radius, exposing systems to denial of service attacks and potentially affecting business continuity.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions include OpenSSL from 3.0.0 to 3.0.7 and Stormshield Management Center prior to 3.3.3. Organizations should ensure they are running patched versions to mitigate the risk associated with this vulnerability.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the latest patches provided by OpenSSL and Stormshield. For OpenSSL, upgrade to versions beyond 3.0.7, and for Stormshield, ensure the version is 3.3.3 or higher.
If patches are unavailable, organizations should consider implementing workarounds, such as restricting access to vulnerable functions and ensuring that only trusted data is processed by applications that use these libraries.
Additionally, enhancing monitoring capabilities to detect potential exploitation attempts can provide an added layer of security.
Organizations should validate their remediation efforts through penetration testing to ensure that similar vulnerabilities are not present in their systems.
Detection Guidance
Organizations should monitor logs for any indicators of exploitation attempts, including unexpected application crashes or abnormal behavior when processing PKCS7 data. Detecting these anomalies early can help in mitigating the impact of this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-0216 lies in its demonstration of how improper data handling can lead to severe availability issues. This vulnerability highlights the importance of validating input data rigorously to prevent potential application crashes.
Security teams need to be vigilant about the patterns this vulnerability represents, particularly in libraries that handle external data. The lessons learned from this incident should inform future development and security testing practices.
As a strategic defensive takeaway, organizations should prioritize securing their application environments by implementing robust data validation and ensuring timely patch management. Continuous security assessments, such as application security assessments, are essential for identifying and mitigating similar vulnerabilities.
To further enhance security posture, organizations may also engage in red teaming exercises to simulate real-world attack scenarios and improve response capabilities.
By taking these proactive measures, organizations can significantly reduce their exposure to vulnerabilities like CVE-2023-0216.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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