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Vulnerability Details :

CVE-2023-42669

Summary
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
Published At-06 Nov, 2023 | 06:57
Updated At-23 Nov, 2024 | 02:00
Rejected At-
Credits

Samba: "rpcecho" development server allows denial of service via sleep() call on ad dc

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:redhat
Assigner Org ID:53f830b8-0a3f-465b-8143-3b8a9948e749
Published At:06 Nov, 2023 | 06:57
Updated At:23 Nov, 2024 | 02:00
Rejected At:
▼CVE Numbering Authority (CNA)
Samba: "rpcecho" development server allows denial of service via sleep() call on ad dc

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.

Affected Products
Collection URL
https://github.com/samba-team/samba
Package Name
samba
Default Status
unaffected
Versions
Affected
  • From 4.0.0 before 4.17.12 (semver)
  • From 4.18.0 before 4.18.8 (semver)
  • 4.19.0
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 8
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/a:redhat:enterprise_linux:8::crb
  • cpe:/o:redhat:enterprise_linux:8::baseos
  • cpe:/a:redhat:enterprise_linux:8::appstream
Default Status
affected
Versions
Unaffected
  • From 0:4.18.6-2.el8_9 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 8
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/a:redhat:enterprise_linux:8::crb
  • cpe:/o:redhat:enterprise_linux:8::baseos
  • cpe:/a:redhat:enterprise_linux:8::appstream
Default Status
affected
Versions
Unaffected
  • From 0:4.18.6-2.el8_9 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 8.6 Extended Update Support
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/o:redhat:rhel_eus:8.6::baseos
  • cpe:/o:redhat:rhev_hypervisor:4.4::el8
  • cpe:/a:redhat:rhel_eus:8.6::crb
  • cpe:/a:redhat:rhel_eus:8.6::appstream
Default Status
affected
Versions
Unaffected
  • From 0:4.15.5-13.el8_6 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 8.8 Extended Update Support
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/a:redhat:rhel_eus:8.8::crb
  • cpe:/o:redhat:rhel_eus:8.8::baseos
  • cpe:/a:redhat:rhel_eus:8.8::appstream
Default Status
affected
Versions
Unaffected
  • From 0:4.17.5-4.el8_8 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 9
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/a:redhat:enterprise_linux:9::crb
  • cpe:/a:redhat:enterprise_linux:9::resilientstorage
  • cpe:/o:redhat:enterprise_linux:9::baseos
  • cpe:/a:redhat:enterprise_linux:9::appstream
Default Status
affected
Versions
Unaffected
  • From 0:4.18.6-101.el9_3 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 9
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/a:redhat:enterprise_linux:9::crb
  • cpe:/a:redhat:enterprise_linux:9::resilientstorage
  • cpe:/o:redhat:enterprise_linux:9::baseos
  • cpe:/a:redhat:enterprise_linux:9::appstream
Default Status
affected
Versions
Unaffected
  • From 0:4.18.6-101.el9_3 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 9.0 Extended Update Support
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/o:redhat:rhel_eus:9.0::baseos
  • cpe:/a:redhat:rhel_eus:9.0::crb
  • cpe:/a:redhat:rhel_eus:9.0::appstream
  • cpe:/a:redhat:rhel_eus:9.0::resilientstorage
Default Status
affected
Versions
Unaffected
  • From 0:4.15.5-111.el9_0 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 9.2 Extended Update Support
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/o:redhat:rhel_eus:9.2::baseos
  • cpe:/a:redhat:rhel_eus:9.2::appstream
  • cpe:/a:redhat:rhel_eus:9.2::resilientstorage
  • cpe:/a:redhat:rhel_eus:9.2::crb
Default Status
affected
Versions
Unaffected
  • From 0:4.17.5-104.el9_2 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/o:redhat:rhel_eus:8.6::baseos
  • cpe:/o:redhat:rhev_hypervisor:4.4::el8
  • cpe:/a:redhat:rhel_eus:8.6::crb
  • cpe:/a:redhat:rhel_eus:8.6::appstream
Default Status
affected
Versions
Unaffected
  • From 0:4.15.5-13.el8_6 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 6
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/o:redhat:enterprise_linux:6
Default Status
unknown
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 6
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba4
CPEs
  • cpe:/o:redhat:enterprise_linux:6
Default Status
unknown
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 7
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/o:redhat:enterprise_linux:7
Default Status
unknown
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Storage 3
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
samba
CPEs
  • cpe:/a:redhat:storage:3
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-400Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-400
Description: Uncontrolled Resource Consumption
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Red Hat severity rating
value:
Moderate
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds

To mitigate this vulnerability, disable rpcecho service on the AD DC by setting: ~~~ dcerpc endpoint servers = -rpcecho ~~~

Exploits
Credits
Timeline
EventDate
Reported to Red Hat.2023-10-03 00:00:00
Made public.2023-10-10 00:00:00
Event: Reported to Red Hat.
Date: 2023-10-03 00:00:00
Event: Made public.
Date: 2023-10-10 00:00:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://access.redhat.com/errata/RHSA-2023:6209
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:6744
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7371
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7408
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7464
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7467
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-42669
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2241884
issue-tracking
x_refsource_REDHAT
https://bugzilla.samba.org/show_bug.cgi?id=15474
N/A
https://www.samba.org/samba/security/CVE-2023-42669.html
N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2023:6209
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2023:6744
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7371
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7408
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7464
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7467
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/security/cve/CVE-2023-42669
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2241884
Resource:
issue-tracking
x_refsource_REDHAT
Hyperlink: https://bugzilla.samba.org/show_bug.cgi?id=15474
Resource: N/A
Hyperlink: https://www.samba.org/samba/security/CVE-2023-42669.html
Resource: N/A
▼Authorized Data Publishers (ADP)
1. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
2. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://access.redhat.com/errata/RHSA-2023:6209
vendor-advisory
x_refsource_REDHAT
x_transferred
https://access.redhat.com/errata/RHSA-2023:6744
vendor-advisory
x_refsource_REDHAT
x_transferred
https://access.redhat.com/errata/RHSA-2023:7371
vendor-advisory
x_refsource_REDHAT
x_transferred
https://access.redhat.com/errata/RHSA-2023:7408
vendor-advisory
x_refsource_REDHAT
x_transferred
https://access.redhat.com/errata/RHSA-2023:7464
vendor-advisory
x_refsource_REDHAT
x_transferred
https://access.redhat.com/errata/RHSA-2023:7467
vendor-advisory
x_refsource_REDHAT
x_transferred
https://access.redhat.com/security/cve/CVE-2023-42669
vdb-entry
x_refsource_REDHAT
x_transferred
https://bugzilla.redhat.com/show_bug.cgi?id=2241884
issue-tracking
x_refsource_REDHAT
x_transferred
https://bugzilla.samba.org/show_bug.cgi?id=15474
x_transferred
https://security.netapp.com/advisory/ntap-20231124-0002/
x_transferred
https://www.samba.org/samba/security/CVE-2023-42669.html
x_transferred
Hyperlink: https://access.redhat.com/errata/RHSA-2023:6209
Resource:
vendor-advisory
x_refsource_REDHAT
x_transferred
Hyperlink: https://access.redhat.com/errata/RHSA-2023:6744
Resource:
vendor-advisory
x_refsource_REDHAT
x_transferred
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7371
Resource:
vendor-advisory
x_refsource_REDHAT
x_transferred
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7408
Resource:
vendor-advisory
x_refsource_REDHAT
x_transferred
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7464
Resource:
vendor-advisory
x_refsource_REDHAT
x_transferred
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7467
Resource:
vendor-advisory
x_refsource_REDHAT
x_transferred
Hyperlink: https://access.redhat.com/security/cve/CVE-2023-42669
Resource:
vdb-entry
x_refsource_REDHAT
x_transferred
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2241884
Resource:
issue-tracking
x_refsource_REDHAT
x_transferred
Hyperlink: https://bugzilla.samba.org/show_bug.cgi?id=15474
Resource:
x_transferred
Hyperlink: https://security.netapp.com/advisory/ntap-20231124-0002/
Resource:
x_transferred
Hyperlink: https://www.samba.org/samba/security/CVE-2023-42669.html
Resource:
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:secalert@redhat.com
Published At:06 Nov, 2023 | 07:15
Updated At:16 Sep, 2024 | 15:15

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Secondary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Type: Primary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CPE Matches
Samba
samba
>>samba>>Versions from 4.0.0(inclusive) to 4.17.12(exclusive)
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
Samba
samba
>>samba>>Versions from 4.18.0(inclusive) to 4.18.8(exclusive)
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
Samba
samba
>>samba>>Versions from 4.19.0(inclusive) to 4.19.1(exclusive)
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>storage>>3.0
cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>enterprise_linux>>8.0
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>enterprise_linux>>9.0
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>enterprise_linux_eus>>9.0
cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>enterprise_linux_for_ibm_z_systems>>9.0_s390x
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>enterprise_linux_for_ibm_z_systems_eus>>9.0_s390x
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.0_s390x:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>enterprise_linux_for_power_little_endian>>9.0_ppc64le
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*
Red Hat, Inc.
redhat
>>enterprise_linux_for_power_little_endian_eus>>9.0_ppc64le
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.0_ppc64le:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE-400Secondarysecalert@redhat.com
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-400
Type: Secondary
Source: secalert@redhat.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://access.redhat.com/errata/RHSA-2023:6209secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:6744secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7371secalert@redhat.com
N/A
https://access.redhat.com/errata/RHSA-2023:7408secalert@redhat.com
N/A
https://access.redhat.com/errata/RHSA-2023:7464secalert@redhat.com
N/A
https://access.redhat.com/errata/RHSA-2023:7467secalert@redhat.com
N/A
https://access.redhat.com/security/cve/CVE-2023-42669secalert@redhat.com
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241884secalert@redhat.com
Issue Tracking
https://bugzilla.samba.org/show_bug.cgi?id=15474secalert@redhat.com
Issue Tracking
https://www.samba.org/samba/security/CVE-2023-42669.htmlsecalert@redhat.com
Vendor Advisory
Hyperlink: https://access.redhat.com/errata/RHSA-2023:6209
Source: secalert@redhat.com
Resource:
Third Party Advisory
Hyperlink: https://access.redhat.com/errata/RHSA-2023:6744
Source: secalert@redhat.com
Resource:
Third Party Advisory
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7371
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7408
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7464
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2023:7467
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2023-42669
Source: secalert@redhat.com
Resource:
Third Party Advisory
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2241884
Source: secalert@redhat.com
Resource:
Issue Tracking
Hyperlink: https://bugzilla.samba.org/show_bug.cgi?id=15474
Source: secalert@redhat.com
Resource:
Issue Tracking
Hyperlink: https://www.samba.org/samba/security/CVE-2023-42669.html
Source: secalert@redhat.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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