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Affected Component
Analysis
samba
Patched
Name
CVE-2023-42669
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.
CWEs
Published Date
Updated Date
Workaround
-
Advisories
https://access.redhat.com/errata/RHSA-2023:6209Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:6744Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-42669Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241884Issue Tracking
https://bugzilla.samba.org/show_bug.cgi?id=15474Issue Tracking
https://www.samba.org/samba/security/CVE-2023-42669.htmlVendor Advisory
https://access.redhat.com/errata/RHSA-2023:6209Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:6744Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-42669Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241884Issue Tracking
https://bugzilla.samba.org/show_bug.cgi?id=15474Issue Tracking
https://www.samba.org/samba/security/CVE-2023-42669.htmlVendor Advisory
Analysis#
Vulnerability Ratings#
6.5
CVSSv31
6.5
CVSSv31
NaN
other
Others affected components#
Resolved with patches#
samba (yocto:kirkstone)
#
Title
Author
Resolve
1
CVE-2023-42669 s4-rpc_server: Disable rpcecho server by
Andrew Bartlett <abartlet@samba.org>
CVE-2023-42669