Improper input validation occurs when a software application fails to verify that input received is within the expected range, format, type, or value before processing. This weakness paves the way for a variety of security exploits, including injection attacks, buffer overflows, and data manipulation, which can compromise application functionality and user data.
CWE-94, or Code Injection, occurs when a software application improperly controls the input used in generating code. This vulnerability allows attackers to inject malicious code, which the application subsequently compiles or interprets. The injected code can execute unintended commands, compromise data integrity, and even provide attackers with full control over the system.
Missing Authorisation, identified by CWE-862, refers to a software weakness where an application fails to verify if a user is permitted to access specific resources or perform certain actions. While authentication establishes identity, authorisation ensures that the authenticated user has the necessary permissions. When authorisation is missing, attackers can exploit this oversight to access sensitive data, perform unauthorised transactions, or disrupt services.
OpenWRT, while highly customisable, is not immune to the common security flaws that affect embedded devices. These can range from default configurations to poorly secured web interfaces
What is ACRStealer?
ACRStealer is an **info stealer malware** designed to **extract sensitive information** from infected systems, including:
– **Antivirus identification** – determining which security solutions are present to evade detection.
– **Crypto wallet theft** – targeting stored cryptocurrency assets.
– **Login credentials theft** – stealing usernames and passwords for financial services, corporate accounts, and personal data.
– **Browser information extraction** – harvesting stored passwords, cookies, and browsing history.
– **File Transfer Protocol (FTP) credential theft** – compromising access to cloud and remote servers.
– **Text file harvesting** – reading and extracting information from text documents.
While information stealers are not new, **ACRStealer stands out** due to its **stealth tactics, sophisticated distribution, and abuse of legitimate cloud platforms**.