CVE-2023-42669 Affecting samba-client package, versions <0:4.18.6-101.el9_3


Severity

Recommended
0.0
medium
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.13% (49th percentile)

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  • Snyk IDSNYK-ORACLE9-SAMBACLIENT-6067125
  • published17 Nov 2023
  • disclosed6 Nov 2023

Introduced: 6 Nov 2023

CVE-2023-42669  (opens in a new tab)

How to fix?

Upgrade Oracle:9 samba-client to version 0:4.18.6-101.el9_3 or higher.
This issue was patched in ELSA-2023-6744.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba-client package and not the samba-client package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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 Scores

version 3.1