CVE-2018-10903

2018-07-3015:00:00

CWE-20

redhat

www.cve.org

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

7.3 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

55.2%

JSON

A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.

CNA Affected

[
  {
    "product": "python-cryptography",
    "vendor": "[UNKNOWN]",
    "versions": [
      {
        "status": "affected",
        "version": "2.3"
      }
    ]
  }
]