Weakness (CWE)
CWE-343: Predictable Value Range from Previous Values
The product's random number generator produces a series of values which, when observed, can be used to infer a relatively small range of possibilities for the next value that could be generated.
How to prevent it (4 mitigations)
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Architecture and Design, Implementation
The output of a random number generator
should not be predictable based on observations of
previous values. -
Implementation
Increase the entropy used to seed a PRNG.
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Architecture and Design, Requirements
Use products or modules that conform to FIPS 140-2 [REF-267] to avoid obvious entropy problems. Consult FIPS 140-2 Annex C ("Approved Random Number Generators").
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Implementation
Use a PRNG that periodically re-seeds itself using input from high-quality sources, such as hardware devices with high entropy. However, do not re-seed too frequently, or else the entropy source might block.
Source: MITRE CWE-343
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Medium 6.6
Insecure Direct Object Reference attack via predictable secret ID in Juju
In Juju from version 3.0.0 through 3.6.18, when a secret owner grants permissions to a secret to a grantee, the secret owner relies exclusively on a predictable XID of the secret to verify ownership. This allows a malicious grantee which can request secrets t…
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Medium 6.5
Schneider Electric Modicon PLCs Predictable Value Range from Previous Values
A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions pri…
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Medium 6.4
GE Hydran M2 Predictable Value Range from Previous Values
The 17046 Ethernet card before 94450214LFMT100SEM-L.R3-CL for the GE Digital Energy Hydran M2 does not properly generate random values for TCP Initial Sequence Numbers (ISNs), which makes it easier for remote attackers to spoof packets by predicting these val…