{
"id": "GHSA-fcf9-3qw3-gxmj",
"aliases": [
"CVE-2018-10903"
],
"details": "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.",
"summary": "PyCA Cryptography vulnerable to GCM tag forgery",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.9.0"
},
{
"fixed": "2.3"
}
]
}
],
"package": {
"name": "cryptography",
"ecosystem": "PyPI"
}
}
],
"modified": "2024-09-13T18:13:03Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"published": "2018-07-31T18:28:09Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-10903",
"type": "ADVISORY"
},
{
"url": "https://github.com/pyca/cryptography/pull/4342",
"type": "WEB"
},
{
"url": "https://github.com/pyca/cryptography/commit/d4378e42937b56f473ddade2667f919ce32208cb",
"type": "WEB"
},
{
"url": "https://access.redhat.com/errata/RHSA-2018:3600",
"type": "WEB"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10903",
"type": "WEB"
},
{
"url": "https://github.com/advisories/GHSA-fcf9-3qw3-gxmj",
"type": "ADVISORY"
},
{
"url": "https://github.com/pyca/cryptography",
"type": "PACKAGE"
},
{
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2018-52.yaml",
"type": "WEB"
},
{
"url": "https://usn.ubuntu.com/3720-1",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-20"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2020-06-16T21:34:18Z"
}
}