Which of the following can be used to compromise a system that is running an RTOS?

Memory injection techniques, such as buffer overflows or heap overflows, can be used

to compromise systems running a Real-Time Operating System (RTOS). RTOS are

often written in languages like C/C++ which are susceptible to memory corruption

vulnerabilities. Exploiting these vulnerabilities can allow an attacker to execute arbitrary

code, thereby compromising the system. Due to their deterministic nature and often

direct hardware control, memory-related attacks are a significant threat to the integrity

and availability of RTOS-based systems.

A. Cross-site scripting (XSS): XSS is a vulnerability typically found in web

applications. While an RTOS could host a web server susceptible to XSS, XSS itself

doesn't directly compromise the RTOS core. It targets users of the web application.

C. Replay attack: A replay attack involves capturing and retransmitting valid data.

While it can disrupt operations or trick systems that use vulnerable protocols, it doesn't

inherently compromise the underlying RTOS in terms of gaining control over its

execution.

D. Ransomware: Ransomware is a type of malicious software that denies access to

a system or its data until a ransom is paid. While an RTOS-based system could be a

target for ransomware, ransomware is the payload, not the primary method of initial

system compromise at the OS level. The compromise would occur via another vector

first.

1. Memory Injection (specifically Buffer Overflows):

o Humayed, A., Lin, J., Klide, F., & Lothspeich, T. (2017). Cybersecurity for a specific

class of cyber-physical systems. IEEE Internet of Things Journal, 4(5), 1566-1575.

(Discusses buffer overflows as a key vulnerability in embedded systems, many of

which run RTOS).

DOI: https://doi.org/10.1109/JIOT.2017.2705217 (Section III.A discusses common

vulnerabilities including buffer overflows)

o National Institute of Standards and Technology (NIST). (2021). Systems Security

Engineering: Considerations for a Multidisciplinary Approach in the Engineering of

Trustworthy Secure Systems (NIST SP 800-160 Vol. 1).

URL: https://csrc.nist.gov/publications/detail/sp/800-160/vol-1/final

Relevant Section: While not RTOS-specific for this point, it broadly discusses system

vulnerabilities. Memory corruption (which includes injection) is a fundamental software

vulnerability class. Section 3.3.3.2 "System Weaknesses and Vulnerabilities" implicitly

covers such low-level issues. Many RTOS are susceptible due to C/C++ usage and

performance constraints.

o Noorman, J., Wouters, L., Vrijdaghs, T., Piessens, F., & Strackx, R. (2017). Sancus

2.0: A Low-Cost Security Architecture for IoT Devices. ACM Transactions on Privacy and

Security (TOPS), 20(3), 1-33. (Discusses memory protection mechanisms for

embedded systems, highlighting the threat of memory corruption attacks).

DOI: https://doi.org/10.1145/3092801 (Introduction and background sections often

describe the threat landscape for embedded systems, including memory attacks).

2. Cross-Site Scripting (XSS):

o OWASP Foundation. "Cross Site Scripting (XSS)".

URL: https://owasp.org/www-community/attacks/xss/

This resource clearly defines XSS as a web application vulnerability, distinct from direct

RTOS compromise.

3. Replay Attack:

o Internet Engineering Task Force (IETF). RFC 4949: Internet Security Glossary,

Version 2.

URL: https://datatracker.ietf.org/doc/html/rfc4949

Section: "replay attack" (Defines it as an attack on a security protocol).

4. Ransomware:

o National Institute of Standards and Technology (NIST). (2021). Data Integrity:

Identifying and Protecting Assets Against Ransomware and Other Destructive Events

(NIST Special Publication 1800-26).

URL: https://www.nccoe.nist.gov/sites/default/files/legacy/files/NIST.SP.1800-26.pdf

Section: 1.2 "The Ransomware Threat" (Describes ransomware as malware that

encrypts files or locks systems, not as the initial vector for OS compromise itself).