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.
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cve-icon MITRE Information

Status: PUBLISHED

Assigner: redhat

Published: 2018-07-30T15:00:00

Updated: 2018-11-14T10:57:02

Reserved: 2018-05-09T00:00:00


Link: CVE-2018-10903

JSON object: View

cve-icon NVD Information

Status : Modified

Published: 2018-07-30T16:29:00.283

Modified: 2021-08-04T17:14:46.777


Link: CVE-2018-10903

JSON object: View

cve-icon Redhat Information

No data.

CWE