CVE-2018-10903 (GCVE-0-2018-10903)
Vulnerability from cvelistv5
Published
2018-07-30 15:00
Modified
2024-08-05 07:54
Severity ?
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
Summary
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.
References
Impacted products
Vendor Product Version
[UNKNOWN] python-cryptography Version: 2.3
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