The product uses a cryptographic key or password past its expiration date, which diminishes its safety significantly by increasing the timing window for cracking attacks against that key.
While the expiration of keys does not necessarily ensure that they are compromised, it is a significant concern that keys which remain in use for prolonged periods of time have a decreasing probability of integrity. For this reason, it is important to replace keys within a period of time proportional to their strength.
Threat Mapped score: 3.0
Industry: Finiancial
Threat priority: P2 - Serious (High)
CVE: CVE-2021-33020
Picture Archiving and Communication System (PACS) system for hospitals uses a cryptographic key or password past its expiration date
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| Phase | Note |
|---|---|
| Architecture and Design | REALIZATION: This weakness is caused during implementation of an architectural security tactic. |
Intro: The following code attempts to verify that a certificate is valid.
Body: The code checks if the certificate is not yet valid, but it fails to check if a certificate is past its expiration date, thus treating expired certificates as valid.
if (cert = SSL_get_peer_certificate(ssl)) { foo=SSL_get_verify_result(ssl); if ((X509_V_OK==foo) || (X509_V_ERRCERT_NOT_YET_VALID==foo)) //do stuff }