PyCA Cryptography vulnerable to GCM tag forgery
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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beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2018-10903US | high7.5 | — | ||
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 leng… | ||||
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Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://access.redhat.com/errata/RHSA-2018:3600WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10903WEB
- https://github.com/advisories/GHSA-fcf9-3qw3-gxmjADVISORY
- https://github.com/pyca/cryptographyPACKAGE
- https://github.com/pyca/cryptography/commit/d4378e42937b56f473ddade2667f919ce32208cbWEB
- https://github.com/pyca/cryptography/pull/4342WEB
- https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2018-52.yamlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2018-10903ADVISORY
scry
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