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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2023-42669

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

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Status
Published
Published
Updated
Assigning organization
redhat

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

samba

Default version status: unaffected

  • 4.0.0 to < 4.17.12affected
  • 4.18.0 to < 4.18.8affected
  • 4.19.0affected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:4.18.6-2.el8_9 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:4.18.6-2.el8_9 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support

Default version status: affected

  • 0:4.15.5-13.el8_6 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support

Default version status: affected

  • 0:4.17.5-4.el8_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:4.18.6-101.el9_3 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:4.18.6-101.el9_3 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support

Default version status: affected

  • 0:4.15.5-111.el9_0 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support

Default version status: affected

  • 0:4.17.5-104.el9_2 to < *unaffected

Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8

Default version status: affected

  • 0:4.15.5-13.el8_6 to < *unaffected

Red Hat Red Hat Enterprise Linux 6

Default version status: unknown

Red Hat Red Hat Enterprise Linux 6

Default version status: unknown

Red Hat Red Hat Enterprise Linux 7

Default version status: unknown

Red Hat Red Hat Storage 3

Default version status: unknown

References