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Exposure of Sensitive Information to an Unauthorized Actor


Severity High
Score 7.5/10


Botan 1.7.15 through 1.10.12, and 1.11.0 through 1.11.28 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.

  • LOW
  • NONE
  • NONE
  • NONE
  • HIGH
  • NONE

CWE-200 - Information Exposure

An information exposure vulnerability is categorized as an information flow (IF) weakness, which can potentially allow unauthorized access to otherwise classified information in the application, such as confidential personal information (demographics, financials, health records, etc.), business secrets, and the application's internal environment.

Advisory Timeline

  • Published