CWE-323Reusing a Nonce, Key Pair in Encryption

Description

Nonces should be used for the present occasion and only once.

Common consequences

• Access Control→Bypass Protection Mechanism,Gain Privileges or Assume Identity
  Potentially a replay attack, in which an attacker could send the same data twice, could be crafted if nonces are allowed to be reused. This could allow a user to send a message which masquerades as a valid message from a valid user.

Potential mitigations

• Implementation
  Refuse to reuse nonce values.
• Implementation
  Use techniques such as requiring incrementing, time based and/or challenge response to assure uniqueness of nonces.

Related CWEs

Recent CVEs classified under this CWE