CVE-2021-36222

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2021-36222
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-36222.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-36222
Downstream
Related
Published
2021-07-22T18:15:23Z
Modified
2025-10-21T02:35:54Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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

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