Vulnerability Details : CVE-2023-42669
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.
Vulnerability category: Denial of service
Products affected by CVE-2023-42669
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.0_ppc64le:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.0_s390x:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-42669
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 48 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-42669
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
Red Hat, Inc. |
CWE ids for CVE-2023-42669
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2023-42669
-
https://access.redhat.com/errata/RHSA-2023:6744
RHSA-2023:6744 - Security Advisory - Red Hat 客户门户网站Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=2241884
2241884 – (CVE-2023-42669) CVE-2023-42669 samba: "rpcecho" development server allows denial of service via sleep() call on AD DCIssue Tracking
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https://security.netapp.com/advisory/ntap-20231124-0002/
October 2023 Samba Vulnerabilities in NetApp Products | NetApp Product Security
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https://bugzilla.samba.org/show_bug.cgi?id=15474
15474 – (CVE-2023-42669) [SECURITY] CVE-2023-42669 rpcecho, enabled and running in AD DC, allows blocking sleep on requestIssue Tracking
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https://www.samba.org/samba/security/CVE-2023-42669.html
Samba - Security Announcement ArchiveVendor Advisory
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https://access.redhat.com/errata/RHSA-2023:6209
RHSA-2023:6209 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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https://access.redhat.com/errata/RHSA-2023:7371
RHSA-2023:7371 - Security Advisory - Red Hat Customer Portal
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https://access.redhat.com/errata/RHSA-2023:7464
RHSA-2023:7464 - Security Advisory - Red Hat Customer Portal
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https://access.redhat.com/errata/RHSA-2023:7467
RHSA-2023:7467 - Security Advisory - Red Hat Customer Portal
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https://access.redhat.com/security/cve/CVE-2023-42669
CVE-2023-42669- Red Hat Customer PortalThird Party Advisory
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https://access.redhat.com/errata/RHSA-2023:7408
RHSA-2023:7408 - Security Advisory - Red Hat Customer Portal
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