Summary Points
- A Belgian eID signing extension, used by over 2 million people, was found to have vulnerabilities that could lead to identity theft, payment hijacking, and remote code execution, with fixes implemented only in July.
- The extension’s design flaws allowed attackers to replay activation tokens, steal PIN codes, and hijack accounts, potentially giving malicious actors full access to sensitive government and banking services.
- Browser extensions pose inherent security risks, especially with cross-page exploits and untrusted message filtering, requiring users to restrict extension permissions to reduce attack surfaces.
- Researchers uncovered a significant remote code execution vulnerability in the native host software, enabling hackers to load malicious DLLs on victims’ machines, affecting multiple sectors globally and exposing a broad security threat.
Security Flaws in Belgium’s eID System Could Let Hackers Take Control
Belgium’s national eID system is facing serious security concerns. A popular browser extension called “Connective” helps citizens log into government and bank sites using their digital ID cards. However, security researchers found major vulnerabilities in the system. The extension was poorly designed, making it easy for hackers to steal identities and payment info. They could also run malicious code on victims’ computers. Although the vendor claims no one has exploited these flaws yet, the risks are real and alarming. These weaknesses highlight how relying on browser add-ons can pose dangers, even in trusted systems.
Understanding How the Flaws Could Lead to Wide-Scale Attacks
The Connective extension requires users to insert their physical ID card and a card reader, then enter a PIN via a pop-up window. This process is meant to protect users from unauthorized access. Yet, researchers found that vulnerabilities in the extension itself could bypass these safeguards. The extension did not verify which website it connected to, and attackers could replay activation tokens from other sites. They could steal PIN codes by intercepting encrypted data with decrypt keys. Attackers could even hijack accounts, reset them using stolen signatures, and stay connected indefinitely. Furthermore, the native host software had a critical flaw: it allowed malicious websites to load harmful software onto victims’ computers, leading to remote code execution. These flaws reveal how a single weak link in the chain can compromise the entire system. As a result, trusting browser extensions with sensitive identity verification is risky, especially without proper security measures.
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