CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
35.1%
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.
access.redhat.com/errata/RHSA-2023:6209
access.redhat.com/errata/RHSA-2023:6744
access.redhat.com/errata/RHSA-2023:7371
access.redhat.com/errata/RHSA-2023:7408
access.redhat.com/errata/RHSA-2023:7464
access.redhat.com/errata/RHSA-2023:7467
access.redhat.com/security/cve/CVE-2023-42669
bugzilla.redhat.com/show_bug.cgi?id=2241884
bugzilla.samba.org/show_bug.cgi?id=15474
security.alpinelinux.org/vuln/CVE-2023-42669
security.netapp.com/advisory/ntap-20231124-0002/
www.samba.org/samba/security/CVE-2023-42669.html
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
35.1%