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
2026-03-10T23:41:32.209623Z
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.

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
d775c95af7606a51bf79547a94fa52ddd1cb7f49
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.18.5"
        }
    ]
}

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

Database specific

unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "1.19.0"
            },
            {
                "fixed": "1.19.3"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "33"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "9.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "v8r13-14338"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "22.1.0"
            }
        ]
    }
]
vanir_signatures 
[
    {
        "signature_type": "Function",
        "deprecated": false,
        "id": "CVE-2021-37750-6610d9b5",
        "target": {
            "file": "src/kdc/do_tgs_req.c",
            "function": "process_tgs_req"
        },
        "digest": {
            "length": 14255.0,
            "function_hash": "256313135997629940279080382534511192649"
        },
        "signature_version": "v1",
        "source": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49"
    },
    {
        "signature_type": "Line",
        "deprecated": false,
        "id": "CVE-2021-37750-d4305430",
        "target": {
            "file": "src/kdc/do_tgs_req.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "85759854495363053129708329220649920226",
                "106951285823959472315379620424094599901",
                "35353251504946687087079113116870528593",
                "137141899296435357137104491440352983080"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-37750.json"