CVE-2017-3733 Encrypt-Then-Mac renegotiation crash

2017-05-0419:00:00

openssl

www.cve.org

AI Score

7.3

Confidence

High

EPSS

0.036

Percentile

91.9%

JSON

During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.

CNA Affected

[
  {
    "product": "OpenSSL",
    "vendor": "OpenSSL",
    "versions": [
      {
        "status": "affected",
        "version": "openssl-1.1.0"
      },
      {
        "status": "affected",
        "version": "openssl-1.1.0a"
      },
      {
        "status": "affected",
        "version": "openssl-1.1.0b"
      },
      {
        "status": "affected",
        "version": "openssl-1.1.0c"
      },
      {
        "status": "affected",
        "version": "openssl-1.1.0d"
      }
    ]
  }
]