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CVE Team
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{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"data_version": "4.0",
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"CVE_data_meta": {
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"ID": "CVE-2023-42669",
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"ASSIGNER": "cve@mitre.org",
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"STATE": "RESERVED"
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"ASSIGNER": "secalert@redhat.com",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
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"value": "A vulnerability was found in Samba's \"rpcecho\" development server, a non-Windows RPC server used to test Samba's DCE/RPC stack elements. This vulnerability stems from an RPC function that can be blocked indefinitely. The issue arises because the \"rpcecho\" service operates with only one worker in the main RPC task, allowing calls to the \"rpcecho\" server to be blocked for a specified time, causing service disruptions. This disruption is triggered by a \"sleep()\" call in the \"dcesrv_echo_TestSleep()\" function under specific conditions. Authenticated users or attackers can exploit this vulnerability to make calls to the \"rpcecho\" server, requesting it to block for a specified duration, effectively disrupting most services and leading to a complete denial of service on the AD DC. The DoS affects all other services as \"rpcecho\" runs in the main RPC task."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "Uncontrolled Resource Consumption",
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"cweId": "CWE-400"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "n/a",
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"product": {
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"product_data": [
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{
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"product_name": "samba",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "4.19.1",
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"status": "unaffected"
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},
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{
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"version": "4.18.8",
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"status": "unaffected"
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},
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{
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"version": "4.17.12",
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"status": "unaffected"
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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{
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"vendor_name": "Red Hat",
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"product": {
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"product_data": [
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{
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"product_name": "Red Hat Enterprise Linux 9.0 Extended Update Support",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "0:4.15.5-111.el9_0",
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"lessThan": "*",
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"versionType": "rpm",
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"status": "unaffected"
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}
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],
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"defaultStatus": "affected"
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}
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}
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]
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}
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},
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{
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"product_name": "Red Hat Enterprise Linux 6",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"defaultStatus": "unknown"
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}
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"defaultStatus": "unknown"
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}
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}
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]
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}
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},
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{
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"product_name": "Red Hat Enterprise Linux 7",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"defaultStatus": "unknown"
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}
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}
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]
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}
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},
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{
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"product_name": "Red Hat Enterprise Linux 8",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"defaultStatus": "affected"
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}
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}
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]
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}
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},
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{
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"product_name": "Red Hat Enterprise Linux 9",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"defaultStatus": "affected"
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}
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}
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]
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}
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},
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{
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"product_name": "Red Hat Storage 3",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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},
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{
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"vendor_name": "Fedora",
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"product": {
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"product_data": [
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{
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"product_name": "Fedora",
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"version": {
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"version_data": [
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://access.redhat.com/errata/RHSA-2023:6209",
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"refsource": "MISC",
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"name": "https://access.redhat.com/errata/RHSA-2023:6209"
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},
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{
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"url": "https://access.redhat.com/security/cve/CVE-2023-42669",
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"refsource": "MISC",
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"name": "https://access.redhat.com/security/cve/CVE-2023-42669"
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},
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{
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241884",
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"refsource": "MISC",
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"name": "https://bugzilla.redhat.com/show_bug.cgi?id=2241884"
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},
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{
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"url": "https://bugzilla.samba.org/show_bug.cgi?id=15474",
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"refsource": "MISC",
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"name": "https://bugzilla.samba.org/show_bug.cgi?id=15474"
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},
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{
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"url": "https://www.samba.org/samba/security/CVE-2023-42669.html",
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"refsource": "MISC",
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"name": "https://www.samba.org/samba/security/CVE-2023-42669.html"
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}
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]
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},
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"work_around": [
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{
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"lang": "en",
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"value": "To mitigate this vulnerability, disable rpcecho service on the AD DC by setting:\n~~~\ndcerpc endpoint servers = -rpcecho\n~~~"
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}
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],
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"impact": {
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"cvss": [
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{
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 6.5,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"version": "3.1"
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}
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]
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}
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