Tenable Research Discovers Remote Code Execution Vulnerabilities in GPON Routers
Tenable Research has discovered six new vulnerabilities in Nokia (Alcatel-Lucent) I-240W-Q GPON routers that can provide attacker with telnet access, DoS the target, or run arbitrary code.
Contexte
Nokia (Alcatel-Lucent) I-240W-Q Gigabit Passive Optical Network (GPON) routers are designed to replace standard copper networks. These routers have become an attractive target for botnets, and turnaround from disclosure to attack is almost immediate.
Tenable researcher Artem Metla has discovered six new vulnerabilities in Nokia (Alcatel-Lucent) I-240W-Q GPON routers (CVE-2019-3917, CVE-2019-3918, CVE-2019-3919, CVE-2019-3920, CVE-2019-3921, CVE-2019-3922). These vulnerabilities include a remotely accessible backdoor, hardcoded credentials, command injections, and stack buffer overflows.
Analyse
CVE-2019-3917 : By sending a specially crafted HTTP request to the device, a remote attacker could partially disable the firewall and expose a Telnet service to external access.
CVE-2019-3918 : Hardcoded root credentials were discovered in Dropbear (SSH) and Telnet services.
CVE-2019-3919, CVE-2019-3920 :An authenticated attacker can utilize malicious HTTP POST requests to take advantage of unsanitized system() calls to execute shell commands as root user and escalate to the router’s OS level.
CVE-2019-3921 (Authenticated), CVE-2019-3922 (Unauthenticated): An attacker can send malicious HTTP requests to trigger stack buffer overflows that cause a DoS, or arbitrary code execution. Researcher Artem Metla has written a proof of concept for CVE-2019-3921.
Impact
If one of these routers is compromised, a threat actor could launch man in the middle (MitM) attacks to sniff network traffic, modify requests and responses and log all communications. Malicious scripts could also be placed on the device to launch attacks against assets that weren’t previously exposed to external attack. Compromised routers could be used in conjunction with other malicious devices to unleash distributed denial of service (DDoS) attacks. Lastly, these devices could be used to spread malware to create a botnet for a variety of malicious uses.
Solution
Nokia is reportedly working on patches for these vulnerabilities. If you believe you are affected, you can reach out to Nokia for more information.
Où trouver plus d'informations
Visit the Tenable Tech Blog on Medium to read researcher Artem Metla’s in-depth story about his work uncovering these vulnerabilities.
Learn more about Tenable, the first Cyber Exposure platform for holistic management of your modern attack surface. Get a free 60-day trial of Tenable.io Vulnerability Management.
Articles connexes
CVE-2024-20353, CVE-2024-20359: Frequently Asked Questions About ArcaneDoor
April 25, 2024Frequently asked questions about CVE-2024-20353 and CVE-2024-20359, two vulnerabilities associated with “ArcaneDoor,” the espionage-related campaign targeting Cisco Adaptive Security Appliances.
Operational Technology in the DoD: Ensuring a Secure and Efficient Power Grid
April 19, 2024In an evolving threat landscape, the DoD must make sure that its mission-critical operations don’t experience power outages.
Strengthening the Nessus Software Supply Chain with SLSA
April 16, 2024You know Tenable as a cybersecurity industry leader whose world-class exposure management products are trusted by our approximately 43,000 customers, including about 60% of the Fortune 500. But sometimes we like to give you a peek behind the curtain to share how we protect our own house against cyberattacks – and that’s what this blog is about. Today we’re sharing our experience adopting the supply-chain security framework SLSA, with the hopes that the lessons we learned will be helpful to you.
Tenable Bolsters Its Cloud Security Arsenal with Malware Detection
May 1, 2024Tenable Cloud Security is enhancing its capabilities with malware detection. Combined with its cutting-edge, agentless vulnerability-scanning technology, including its ability to detect anomalous behavior, this new capability makes Tenable Cloud Security a much more complete and effective solution. Read on to find out how.
Cybersecurity Snapshot: Latest MITRE ATT&CK Update Offers Security Insights on GenAI, Identity, Cloud and CI/CD
April 26, 2024Check out what’s new in Version 15 of the MITRE ATT&CK knowledge base of adversary tactics, techniques and procedures. Plus, learn the latest details about the Change Healthcare breach, including the massive scope of the data exfiltration. In addition, why AI cyberthreats aren’t impacting CISOs’ budgets. And much more!
CVE-2024-20353, CVE-2024-20359: Frequently Asked Questions About ArcaneDoor
April 25, 2024Frequently asked questions about CVE-2024-20353 and CVE-2024-20359, two vulnerabilities associated with “ArcaneDoor,” the espionage-related campaign targeting Cisco Adaptive Security Appliances.
- Vulnerability Management