CVE-2021-37750

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-37750", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-10-14T11:49:13.440Z", "dateReserved": "2021-07-30T00:00:00.000Z", "datePublished": "2021-08-23T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2022-10-11T00:00:00.000Z"}, "descriptions": [{"lang": "en", "value": "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/do_tgs_req.c via a FAST inner body that lacks a server field."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://web.mit.edu/kerberos/advisories/"}, {"url": "https://github.com/krb5/krb5/releases"}, {"name": "FEDORA-2021-f2c8514f02", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/"}, {"name": "[debian-lts-announce] 20210930 [SECURITY] [DLA 2771-1] krb5 security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html"}, {"url": "https://www.oracle.com/security-alerts/cpujul2022.html"}, {"url": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49"}, {"url": "https://security.netapp.com/advisory/ntap-20210923-0002/"}, {"url": "https://www.starwindsoftware.com/security/sw-20220817-0004/"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T01:30:08.497Z"}, "title": "CVE Program Container", "references": [{"url": "https://web.mit.edu/kerberos/advisories/", "tags": ["x_transferred"]}, {"url": "https://github.com/krb5/krb5/releases", "tags": ["x_transferred"]}, {"name": "FEDORA-2021-f2c8514f02", "tags": ["vendor-advisory", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/"}, {"name": "[debian-lts-announce] 20210930 [SECURITY] [DLA 2771-1] krb5 security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html"}, {"url": "https://www.oracle.com/security-alerts/cpujul2022.html", "tags": ["x_transferred"]}, {"url": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20210923-0002/", "tags": ["x_transferred"]}, {"url": "https://www.starwindsoftware.com/security/sw-20220817-0004/", "tags": ["x_transferred"]}]}, {"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-14T11:49:13.440Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.0", "lessThan": "V3.1.5", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"}]}]}}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}, {"affectedData": [{"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [{"lessThan": "V3.1.5", "status": "affected", "version": "V3.1.0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [{"lessThan": "V3.1.5", "status": "affected", "version": "V3.1.0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [{"lessThan": "V3.1.5", "status": "affected", "version": "V3.1.0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "vendor": "Siemens", "versions": [{"lessThan": "V3.1.5", "status": "affected", "version": "V3.1.0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "vendor": "Siemens", "versions": [{"lessThan": "V3.1.5", "status": "affected", "version": "V3.1.0", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF5D8B08-B0D6-4586-90E9-699344F5FDF5", "versionEndExcluding": "1.18.5", "vulnerable": true}, {"criteria": "cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*", "matchCriteriaId": "500DB7B1-F8ED-4C89-8CDE-26DD02CB5A18", "versionEndExcluding": "1.19.3", "versionStartIncluding": "1.19.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14338:*:*:*:*:*:*", "matchCriteriaId": "69561727-6405-4EAF-905E-6D5C9761E6EB", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:22.1.0:*:*:*:*:*:*:*", "matchCriteriaId": "D6577F14-36B6-46A5-A1B1-FCCADA61A23B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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/do_tgs_req.c via a FAST inner body that lacks a server field."}, {"lang": "es", "value": "El Centro de Distribuci\u00f3n de Claves (KDC) en MIT Kerberos 5 (tambi\u00e9n se conoce como krb5) versiones anteriores a 1.18.5 y 1.19.x versiones anteriores a 1.19.3, presenta una desreferencia de puntero NULL en el archivo kdc/do_tgs_req.c por medio de un cuerpo interno FAST que carece de un campo de servidor."}], "id": "CVE-2021-37750", "lastModified": "2026-10-14T12:17:15.293", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-08-23T05:15:08.063", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/krb5/krb5/releases"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210923-0002/"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://web.mit.edu/kerberos/advisories/"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpujul2022.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.starwindsoftware.com/security/sw-20220817-0004/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/krb5/krb5/releases"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210923-0002/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://web.mit.edu/kerberos/advisories/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpujul2022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.starwindsoftware.com/security/sw-20220817-0004/"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:4788", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "krb5-0:1.15.1-51.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-11-23T00:00:00Z"}, {"advisory": "RHSA-2021:3576", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "krb5-0:1.18.2-8.3.el8_4", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-09-21T00:00:00Z"}], "bugzilla": {"description": "krb5: NULL pointer dereference in process_tgs_req() in kdc/do_tgs_req.c via a FAST inner body that lacks server field", "id": "1996834", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1996834"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-476", "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/do_tgs_req.c via a FAST inner body that lacks a server field.", "A flaw was found in krb5. The Key Distribution Center (KDC) in MIT Kerberos 5 has a NULL pointer dereference via a FAST inner body that lacks a server field. An authenticated attacker could use this flaw to crash the Kerberos KDC server. The highest threat from this vulnerability is to system availability."], "name": "CVE-2021-37750", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:6", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat JBoss Enterprise Application Platform 6"}], "public_date": "2021-08-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-37750\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-37750"], "threat_severity": "Moderate"}

{}