Friday, December 8, 2023

Samba Vulnerability Leads to DoS in DNServer and Can Crash Active Directory Services

Samba released security updates for a couple of vulnerabilities that could cause Denial of Service in dnsserver and LDAP server crash.

Denial of Service in DNS Server

The vulnerability allows an authenticated user to crash the RPC server via a NULLpointer de-reference. The DNS server RPC provides admin access to manager DNS records and zones.

Following are the affected Samba version 4.9 and 4.10, and it has been fixed with Samba 4.9.9 and 4.10.5. The vulnerability can be tracked as CVE-2019-12435 and has CVSS:3.0 severity score 6.5.

Samba also suggested a workaround by setting ‘dcerpc endpoint servers = -dnsserver‘ in the smb.conf and restarting Samba.

LDAP server crash

All the versions of Samba since 4.10.0 are affected with the vulnerability, a user with read access can crash the LDAP server process, but it depends on the Samba version and process model, “this may crash only the user’s own connection.”

“Specifically, while in Samba 4.10, the default is for one process per connected client, site-specific configuration trigger can change this.”

Samba versions since 4.10.0 are affected, and it has been fixed with 4.10.5. The vulnerability can be tracked as CVE-2019-12436 and has CVSS:3.0 severity score 6.5.

Samba suggested a workaround “return to the default configuration by running ‘samba’ with -M standard, however, this may consume more memory and would not address the \DC\homes issue.”

Administrators are recommended to update this release or apply the patch as soon as possible to address Samba Vulnerability.

Follow us on Linkedin, Twitter, Facebook for daily Cybersecurity updates also you can take the Best Cybersecurity courses online to keep your self-updated.

SambaCry Vulnerability used in Deploying Payloads Targeting IoT devices Particularly NAS

SambaCry Vulnerability used by Hackers to attack Linux Servers and Mine’s Cryptocurrency

Website

Latest articles

Exploitation Methods Used by PlugX Malware Revealed by Splunk Research

PlugX malware is sophisticated in evasion, as it uses the following techniques to avoid...

TA422 Hackers Attack Organizations Using Outlook & WinRAR Vulnerabilities

Hackers exploit Outlook and WinRAR vulnerabilities because these widely used software programs are lucrative...

Bluetooth keystroke-injection Flaw: A Threat to Apple, Linux & Android Devices

An unauthenticated Bluetooth keystroke-injection vulnerability that affects Android, macOS, and iOS devices has been...

Atlassian Patches RCE Flaw that Affected Multiple Products

Atlassian has been discovered with four new vulnerabilities associated with Remote Code Execution in...

Reflectiz Introduces AI-powered Insights on Top of Its Smart Alerting System

Reflectiz, a cybersecurity company specializing in continuous web threat management, proudly introduces a new...

SLAM Attack Gets Root Password Hash in 30 Seconds

Spectre is a class of speculative execution vulnerabilities in microprocessors that can allow threat...

Akira Ransomware Exploiting Zero-day Flaws For Organization Network Access

The Akira ransomware group, which first appeared in March 2023, has been identified as...

Endpoint Strategies for 2024 and beyond

Converge and Defend

What's the pulse of Unified Endpoint Management and Security (UEMS) in Europe? Join us live to uncover the strategies that are defining endpoint security in the region.

Related Articles