CVE-2023-40012
5.9 · MEDIUMOverview
CVE-2023-40012 is a medium-severity vulnerability affecting trailofbits uthenticode. It was published on August 9, 2023 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
uthenticode is a small cross-platform library for partially verifying Authenticode digital signatures. Versions of uthenticode prior to the 2.x series did not check Extended Key Usages in certificates, in violation of the Authenticode X.509 certificate profile. As a result, a malicious user could produce a "signed" PE file that uthenticode would verify and consider valid using an X.509 certificate that isn't entitled to produce code signatures (e.g., a SSL certificate). By design, uthenticode does not perform full-chain validation. However, the absence of EKU validation was an unintended oversight. The 2.0.0 release series includes EKU checks. There are no workarounds to this vulnerability.
Remediation
Check the references section for vendor advisories and patches from trailofbits. Update uthenticode to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| trailofbits | uthenticode | >= 0, < 2.0.0 | Affected |
References
Frequently Asked Questions
What is CVE-2023-40012?
CVE-2023-40012 is a medium-severity vulnerability affecting trailofbits uthenticode. It was published on August 9, 2023 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2023-40012?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-40012?
Check the references section for vendor advisories and patches from trailofbits. Update uthenticode to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-40012?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-40012 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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