samba: fix 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.

References:
https://nvd.nist.gov/vuln/detail/CVE-2023-42669

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

0 files changed, 0 insertions, 0 deletions