CVE-2018-10903

A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalizewithtag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalizewithtag 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.

Database specific

{
    "unresolved_ranges": [
        {
            "vendor_product": "canonical:ubuntu_linux",
            "cpes": [
                "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "18.04"
                },
                {
                    "last_affected": "18.04"
                }
            ],
            "source": "CPE_STRING"
        },
        {
            "cpes": [
                "cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:openstack",
            "extracted_events": [
                {
                    "introduced": "13"
                },
                {
                    "last_affected": "13"
                }
            ],
            "source": "CPE_STRING"
        }
    ]
}

References

Affected packages

Git / github.com/pyca/cryptography

Affected ranges

Type

GIT

Repo

https://github.com/pyca/cryptography

Events

Introduced

Fixed

0a846e294806478770469219a26cd49dcb5502d7

Database specific

{
    "cpe": "cpe:2.3:a:cryptography:python-cryptography:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.9.0"
        },
        {
            "fixed": "2.3"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

0.*

0.1

0.2

0.3

0.4

0.5

0.5.1

0.6

0.7

0.8

0.9

1.*

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

2.*

2.0

2.1

2.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-10903.json"