CVE-2023-42669 Samba: "rpcecho" development server allows denial of service via sleep() call on ad dc
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.
Problem types: cwe_id: CWE-400
description: Uncontrolled Resource Consumption
Affected products: default_status: unaffected
vendor: Red Hat
product: Red Hat Enterprise Linux 8
cpes: cpe:/o:redhat:enterprise_linux:8::baseos
cpe:/a:redhat:enterprise_linux:8::appstream
cpe:/a:redhat:enterprise_linux:8::crb
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8
cpes: cpe:/o:redhat:enterprise_linux:8::baseos
cpe:/a:redhat:enterprise_linux:8::appstream
cpe:/a:redhat:enterprise_linux:8::crb
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:8.6::appstream
cpe:/o:redhat:rhev_hypervisor:4.4::el8
cpe:/o:redhat:rhel_eus:8.6::baseos
cpe:/a:redhat:rhel_eus:8.6::crb
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:8.8::appstream
cpe:/o:redhat:rhel_eus:8.8::baseos
cpe:/a:redhat:rhel_eus:8.8::crb
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9
cpes: cpe:/o:redhat:enterprise_linux:9::baseos
cpe:/a:redhat:enterprise_linux:9::resilientstorage
cpe:/a:redhat:enterprise_linux:9::crb
cpe:/a:redhat:enterprise_linux:9::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9
cpes: cpe:/o:redhat:enterprise_linux:9::baseos
cpe:/a:redhat:enterprise_linux:9::resilientstorage
cpe:/a:redhat:enterprise_linux:9::crb
cpe:/a:redhat:enterprise_linux:9::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:9.0::appstream
cpe:/o:redhat:rhel_eus:9.0::baseos
cpe:/a:redhat:rhel_eus:9.0::resilientstorage
cpe:/a:redhat:rhel_eus:9.0::crb
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.2 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:9.2::crb
cpe:/a:redhat:rhel_eus:9.2::resilientstorage
cpe:/o:redhat:rhel_eus:9.2::baseos
cpe:/a:redhat:rhel_eus:9.2::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
cpes: cpe:/a:redhat:rhel_eus:8.6::appstream
cpe:/o:redhat:rhev_hypervisor:4.4::el8
cpe:/o:redhat:rhel_eus:8.6::baseos
cpe:/a:redhat:rhel_eus:8.6::crb
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 6
cpes: cpe:/o:redhat:enterprise_linux:6
default_status: unknown
vendor: Red Hat
product: Red Hat Enterprise Linux 6
cpes: cpe:/o:redhat:enterprise_linux:6
default_status: unknown
vendor: Red Hat
product: Red Hat Enterprise Linux 7
cpes: cpe:/o:redhat:enterprise_linux:7
default_status: unknown
vendor: Red Hat
product: Red Hat Storage 3
cpes: cpe:/a:redhat:storage:3
default_status: unknown
CVSS v3.1: 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
Published: 2023-11-06T06:57:28.981Z