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Missing Cryptographic Step


Severity Medium
Score 5/10


ssl3_get_record in s3_pkt.c for OpenSSL versions 0.9.6c through 0.9.6h, and 0.9.7 before 0.9.7a does not perform a MAC computation if an incorrect block cipher padding is used, which causes an information leak (timing discrepancy) that may make it easier to launch cryptographic attacks that rely on distinguishing between padding and MAC verification errors, possibly leading to extraction of the original plaintext, aka the "Vaudenay timing attack."

  • LOW
  • NONE
  • NONE
  • NONE

CWE-325 - Missing Cryptographic Step

The product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm.


Advisory Timeline

  • Published