Description
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.
No analysis available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2018-0030 | 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. |
Github GHSA |
GHSA-fcf9-3qw3-gxmj | PyCA Cryptography vulnerable to GCM tag forgery |
Ubuntu USN |
USN-3720-1 | python-cryptography vulnerability |
References
History
No history.
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-05T07:54:36.330Z
Reserved: 2018-05-09T00:00:00.000Z
Link: CVE-2018-10903
No data.
Status : Modified
Published: 2018-07-30T16:29:00.283
Modified: 2024-11-21T03:42:16.003
Link: CVE-2018-10903
OpenCVE Enrichment
No data.
Weaknesses
EUVD
Github GHSA
Ubuntu USN