Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Not supplied / Not supplied | affected 4.0.0 before 4.17.12; affected 4.18.0 before 4.18.8; affected 4.19.0 |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:4.18.6-2.el8_9 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:4.18.6-2.el8_9 before * |
| Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support | unaffected 0:4.15.5-13.el8_6 before * |
| Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support | unaffected 0:4.17.5-4.el8_8 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:4.18.6-101.el9_3 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:4.18.6-101.el9_3 before * |
| Red Hat / Red Hat Enterprise Linux 9.0 Extended Update Support | unaffected 0:4.15.5-111.el9_0 before * |
| Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support | unaffected 0:4.17.5-104.el9_2 before * |
| Red Hat / Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | unaffected 0:4.15.5-13.el8_6 before * |
| Red Hat / Red Hat Enterprise Linux 6 | unknown |
| Red Hat / Red Hat Enterprise Linux 6 | unknown |
| Red Hat / Red Hat Enterprise Linux 7 | unknown |
| Red Hat / Red Hat Storage 3 | unknown |
CWE
CWE-400
References
- https://access.redhat.com/errata/RHSA-2023:6209
- https://access.redhat.com/errata/RHSA-2023:6744
- https://access.redhat.com/errata/RHSA-2023:7371
- https://access.redhat.com/errata/RHSA-2023:7408
- https://access.redhat.com/errata/RHSA-2023:7464
- https://access.redhat.com/errata/RHSA-2023:7467
- https://access.redhat.com/security/cve/CVE-2023-42669
- https://bugzilla.redhat.com/show_bug.cgi?id=2241884
- https://bugzilla.samba.org/show_bug.cgi?id=15474
- https://www.samba.org/samba/security/CVE-2023-42669.html
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://access.redhat.com/errata/RHSA-2023:6209
- https://access.redhat.com/errata/RHSA-2023:6744
- https://access.redhat.com/errata/RHSA-2023:7371
- https://access.redhat.com/errata/RHSA-2023:7408
- https://access.redhat.com/errata/RHSA-2023:7464
- https://access.redhat.com/errata/RHSA-2023:7467
- https://access.redhat.com/security/cve/CVE-2023-42669
- https://bugzilla.redhat.com/show_bug.cgi?id=2241884
- https://bugzilla.samba.org/show_bug.cgi?id=15474
- https://security.netapp.com/advisory/ntap-20231124-0002/
- https://www.samba.org/samba/security/CVE-2023-42669.html