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Observable Discrepancy

CVE-2020-36424

Medium
4.7/10

Summary

An issue was discovered in Arm MbedTLS through 2.7.16, 2.8.0 through 2.16.7, 2.17.0 through 2.24.0. An attacker can recover a "private key" (for RSA or static Diffie-Hellman) via a side-channel attack against generation of base blinding/unblinding values.

  • HIGH
  • LOCAL
  • NONE
  • UNCHANGED
  • NONE
  • LOW
  • HIGH
  • NONE

CWE-203 - Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

References

Advisory Timeline

  • Published