CVE-2021-36222

ecverify in kdc/kdcpreauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.

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

fc98f520caefff2e5ee9a0026fdf5109944b3562

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "id": "CVE-2021-36222-4eafeb47",
        "source": "https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562",
        "digest": {
            "line_hashes": [
                "11212649172673180521140604104188591304",
                "228806048721091709572489333951828356198",
                "321289942291638231764076182789317623244",
                "93469301882783218346945084207915710111"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "deprecated": false,
        "target": {
            "file": "src/kdc/kdc_preauth_ec.c"
        }
    },
    {
        "signature_version": "v1",
        "id": "CVE-2021-36222-f3fc596a",
        "source": "https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562",
        "digest": {
            "length": 2350.0,
            "function_hash": "137210320503581614737329061627982532169"
        },
        "signature_type": "Function",
        "deprecated": false,
        "target": {
            "file": "src/kdc/kdc_preauth_ec.c",
            "function": "ec_verify"
        }
    }
]