Weakness · Medium
CWE-333: Improper Handling of Insufficient Entropy in TRNG
What it is
True random number generators (TRNG) generally have a limited source of entropy and therefore can fail or block.
- Severity (our rating)
- Medium
- Likelihood of exploit
- Low
- Introduced during
- Architecture and Design, Implementation
- Exploited in the wild
- No CVE in CISA's catalog
In more detail
The rate at which true random numbers can be generated is limited. It is important that one uses them only when they are needed for security.
What an attacker can do
- DoS: Crash, Exit, or Restart (Availability)
How to prevent it
Implementation
- Rather than failing on a lack of random numbers, it is often preferable to wait for more numbers to be created.
H2 Security
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Start freeSource: MITRE Common Weakness Enumeration, CWE version 4.19.1. CWE is a trademark of The MITRE Corporation.