CVE-2018-10903
mediumPriorität · verfolgen · 31EPSS 0.032 · 88. PerzentilEUUSEPSS · bewertet 2026-10-28
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.
cvss
Technischer Schweregrad, 0–10. Eine Zeile je Quelle.
Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 5–7.5
schwächen
Die CWE-Schwächeklassen, zu denen dies gehört.
betroffene Produkte (6)
Betroffene Produkte und Versionsbereiche.
- cryptography python-cryptography1.9.0 → 2.3nvdUScpe:2.3:a:cryptography:python-cryptography:*:*:*:*:*:*:*:*
Advisories (2)
Hersteller- und Ökosystem-Meldungen dazu.
- GHSA-fcf9-3qw3-gxmjPyCA Cryptography vulnerable to GCM tag forgery2018-07-31ghsa · osvUS
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.
- PYSEC-2018-522018-07-30vendor · osvUS
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.
auch bekannt als (6)
Weitere Namen und Kennungen dieser Entität.
quellen
Welche Quellen diesen Datensatz belegen und wann.
Referenzen (14)
Externe Belege — Patches, Meldungen, Analysen.
- https://access.redhat.com/errata/RHSA-2018:3600cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10903cnnvd
- https://github.com/pyca/cryptography/pull/4342/commits/688e0f673bfbf43fa898994326c6877f00ab19efcnnvd
- https://usn.ubuntu.com/3720-1/cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.1066/cnnvd
- https://www.auscert.org.au/bulletins/ESB-2022.6015cnnvd
- https://access.redhat.com/errata/RHSA-2018:3600enisa_euvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10903enisa_euvd
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