CVE-2021-37750

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Source
https://cve.org/CVERecord?id=CVE-2021-37750
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-37750.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-37750
Downstream
Related
Published
2021-08-23T05:15:08.063Z
Modified
2026-07-08T22:13:45.076407Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/dotgsreq.c via a FAST inner body that lacks a server field.

Database specific 
{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "1.18.5"
                }
            ],
            "vendor_product": "mit:kerberos_5",
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                }
            ],
            "vendor_product": "debian:debian_linux",
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                }
            ],
            "vendor_product": "fedoraproject:fedora",
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "22.1.0"
                },
                {
                    "last_affected": "22.1.0"
                }
            ],
            "vendor_product": "oracle:communications_cloud_native_core_network_slice_selection_function",
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:22.1.0:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "v8r13-14338"
                },
                {
                    "last_affected": "v8r13-14338"
                }
            ],
            "vendor_product": "starwindsoftware:starwind_virtual_san",
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14338:*:*:*:*:*:*"
            ]
        }
    ]
}
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
78e00c57d8aea567ab435fe802b730029fded242
Fixed
f886ccde056f3e8ad4c1fb35cb9f4a7d7f1c1d5c
Fixed
d775c95af7606a51bf79547a94fa52ddd1cb7f49
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.18.5"
        },
        {
            "introduced": "1.19.0"
        },
        {
            "fixed": "1.19.3"
        }
    ],
    "cpe": "cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

krb5-1.*
krb5-1.18-beta1
krb5-1.18-beta2
krb5-1.18-final
krb5-1.18.1-final
krb5-1.18.2-final
krb5-1.18.3-final
krb5-1.18.4-final
krb5-1.19-beta1
krb5-1.19-beta2
krb5-1.19-final
krb5-1.19.1-final
krb5-1.19.2-final

Database specific

vanir_signatures 
[
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "length": 14255.0,
            "function_hash": "256313135997629940279080382534511192649"
        },
        "id": "CVE-2021-37750-6610d9b5",
        "signature_type": "Function",
        "source": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49",
        "target": {
            "function": "process_tgs_req",
            "file": "src/kdc/do_tgs_req.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "85759854495363053129708329220649920226",
                "106951285823959472315379620424094599901",
                "35353251504946687087079113116870528593",
                "137141899296435357137104491440352983080"
            ]
        },
        "id": "CVE-2021-37750-d4305430",
        "signature_type": "Line",
        "source": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49",
        "target": {
            "file": "src/kdc/do_tgs_req.c"
        }
    }
]
vanir_signatures_modified 
"2026-07-08T22:13:45Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-37750.json"