CVE-2023-39969
9.0 · CRITICALOverview
CVE-2023-39969 is a critical-severity vulnerability affecting trailofbits uthenticode. It was published on August 9, 2023 and has a CVSS 3.1 base score of 9.0 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. 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. Version 1.0.9 of uthenticode hashed the entire file rather than hashing sections by virtual address, in violation of the Authenticode specification. As a result, an attacker could modify code within a binary without changing its Authenticode hash, making it appear valid from uthenticode's perspective. Versions of uthenticode prior to 1.0.9 are not vulnerable to this attack, nor are versions in the 2.x series. By design, uthenticode does not perform full-chain validation. However, the malleability of signature verification introduced in 1.0.9 was an unintended oversight. The 2.x series addresses the vulnerability. Versions prior to 1.0.9 are also not vulnerable, but users are encouraged to upgrade rather than downgrade. 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, < 1.0.9 | Affected |
References
Frequently Asked Questions
What is CVE-2023-39969?
CVE-2023-39969 is a critical-severity vulnerability affecting trailofbits uthenticode. It was published on August 9, 2023 and has a CVSS 3.1 base score of 9.0 (CRITICAL).
How severe is CVE-2023-39969?
This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-39969?
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-2023-39969?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-39969 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.
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