CVE-CVE-2023-42669 | MEDIUM Severity | CVEDatabase.com

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-400NVD-CWE-noinfo

Metadata

Primary Vendor: SAMBA
Published: 11/6/2023
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

samba : sambasamba : sambasamba : sambaredhat : storageredhat : enterprise_linuxredhat : enterprise_linuxredhat : enterprise_linux_eusredhat : enterprise_linux_for_ibm_z_systemsredhat : enterprise_linux_for_ibm_z_systems_eusredhat : enterprise_linux_for_power_little_endianredhat : enterprise_linux_for_power_little_endian_eus

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View on NIST NVD