CVE-2023-0401 is a high-severity vulnerability affecting OpenSSL and Stormshield Management Center. This vulnerability allows a NULL pointer to be dereferenced when verifying signatures on PKCS7 signed or signedAndEnveloped data. The risk to organizations includes system crashes, as the unavailability of a hash algorithm can result in invalid usage of the digest API.
The vulnerability is classified with a CVSS score of 7.5, indicating high severity due to its potential impact on system availability. Attackers may leverage this flaw to exploit third-party applications that utilize the affected OpenSSL functions to validate signatures on untrusted data.
Organizations should prioritize patching immediately, as the vulnerability is present in versions 3.0.0 to 3.0.7 of OpenSSL and specific versions of Stormshield Management Center. Failure to address this vulnerability may lead to significant operational disruptions.
The official OpenSSL advisory provides detailed information on the vulnerability and available patches. Organizations are encouraged to review their configurations to ensure that vulnerable versions are updated.
Vulnerability Details
The vulnerability is characterized by a missing check for the return value from the initialization function of the digest API, which can lead to a NULL pointer dereference. This issue can occur if the hash algorithm used for the signature is known but not available in the OpenSSL library, particularly under FIPS-enabled configurations or when the legacy provider is not loaded.
The affected products include OpenSSL version 3.0.0 to 3.0.7 and specific versions of Stormshield Management Center. The vulnerability has been classified under CWE-476, indicating a NULL pointer dereference.
This vulnerability was published on February 8, 2023, and has undergone status modifications since then. Organizations must apply the latest patches to mitigate associated risks.
Technical Analysis
The root cause of this vulnerability lies in the inadequate checks for the return values from critical functions within the OpenSSL library. Specifically, the attack vector is network-based, and the attack complexity is low, meaning that the vulnerability can be exploited with minimal effort by an attacker.
No privileges are required to exploit this vulnerability, and no user interaction is necessary. The impact on availability is significant, as the vulnerability could lead to application crashes, disrupting services reliant on OpenSSL functionalities.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2023-0401 is substantial. Organizations using OpenSSL or Stormshield Management Center in their infrastructure may experience significant disruptions if this vulnerability is exploited. The blast radius potential is wide, affecting any third-party application that relies on these libraries for signature verification.
Given the CVSS score of 7.5 and the active nature of this vulnerability, organizations should address this issue in their priority patch cycle. The urgency is heightened due to the availability impact, as systems could become inoperable without immediate remediation.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include OpenSSL from 3.0.0 to 3.0.7 and specific versions of Stormshield Management Center. Organizations using these versions should ensure they are updated to the latest patches to mitigate risks.
Mitigation & Remediation
Organizations should prioritize patching to the latest version of OpenSSL. For those unable to immediately upgrade, consider implementing configuration hardening and network controls to limit exposure. Regular monitoring should also be established to detect any anomalies related to this vulnerability.
More information on patching can be found through penetration testing services.
Detection Guidance
Monitoring logs for unusual behaviors during PKCS7 signature verification processes can help identify exploitation attempts. Look for anomalies indicative of crashes or unexpected behaviors in applications utilizing OpenSSL.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-0401 underscores the need for organizations to maintain robust vulnerability management practices. This incident highlights a trend where insufficient validation checks can lead to severe availability impacts.
Security teams should conduct regular assessments and engage in penetration testing methodology to identify and mitigate weaknesses proactively.
Understanding the implications of the vulnerability can inform future development practices and assist in building a more resilient architecture against similar threats. Organizations are encouraged to explore vulnerability management programs and establish a culture of security awareness.
To stay informed about evolving threats, organizations should consider leveraging continuous penetration testing services for ongoing risk assessments and immediate remediation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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