Samba: "rpcecho" development server allows denial of service via sleep() call on ad dc
Summary
Samba: "rpcecho" development server allows denial of service via sleep() call on ad dc
Original description
The description as published by the source.
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.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2023-42669 samba Fixed in: 4.18.8-r0
- Debian DEBIAN-CVE-2023-42669 samba
References
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory github.com
- advisory nvd.nist.gov
- advisory security.netapp.com
- package github.com
- report bugzilla.redhat.com
- report bugzilla.samba.org
- web access.redhat.com
- web samba.org