CVE-2016-3120

The validateasrequest function in kdcutil.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrictanonymoustotgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.

References

Affected packages

Git / github.com/krb5/krb5

Affected ranges

Type: GIT
Repo: https://github.com/krb5/krb5
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7

Database specific

{
    "vanir_signatures": [
        {
            "signature_version": "v1",
            "signature_type": "Function",
            "target": {
                "file": "src/kdc/kdc_util.c",
                "function": "validate_as_request"
            },
            "deprecated": false,
            "digest": {
                "length": 2440.0,
                "function_hash": "114832735742266611359956904032110077760"
            },
            "id": "CVE-2016-3120-5b944c3f",
            "source": "https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7"
        },
        {
            "signature_version": "v1",
            "signature_type": "Line",
            "target": {
                "file": "src/kdc/kdc_util.c"
            },
            "deprecated": false,
            "digest": {
                "line_hashes": [
                    "188127353243240745192543305669040301596",
                    "230037708568997149536374049167456462409",
                    "300683140533483817075971560559028595358",
                    "160102550585688257047493868450817751983"
                ],
                "threshold": 0.9
            },
            "id": "CVE-2016-3120-9c22472c",
            "source": "https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7"
        }
    ]
}