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Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: A critical stack buffer overflow in **libbiosig** (BioSig Project). <br>π₯ **Consequences**: Attackers can execute **arbitrary code** on the target system. This is a severe integrity and availability risk.
Q2Root Cause? (CWE/Flaw)
π‘οΈ **Root Cause**: **CWE-121** (Stack-based Buffer Overflow). <br>π **Flaw**: The **MFER parsing function** fails to properly validate input lengths, allowing data to overflow the stack buffer.
Q3Who is affected? (Versions/Components)
π’ **Affected**: **The Biosig Project** / **libbiosig**. <br>π¦ **Version**: Specifically **v3.9.0**. <br>β οΈ **Scope**: Any system using this specific version for biomedical signal processing.
Q4What can hackers do? (Privileges/Data)
π΅οΈ **Hacker Power**: Full **Remote Code Execution (RCE)**. <br>π **Privileges**: Gains the same privileges as the application user.β¦
π **Threshold**: **LOW**. <br>π **Auth**: No authentication required (**PR:N**). <br>π±οΈ **UI**: No user interaction needed (**UI:N**). <br>π **Network**: Network exploitable (**AV:N**).
Q6Is there a public Exp? (PoC/Wild Exploitation)
π **Public Exp?**: **No PoC provided** in the data. <br>π **Status**: Reference to **Talos Intelligence** report exists, but no public exploit code is listed in the vulnerability data.
Q7How to self-check? (Features/Scanning)
π **Self-Check**: Scan for **libbiosig v3.9.0**. <br>π **Feature**: Look for applications using the **MFER parsing** feature.β¦
π§ **Workaround**: **Disable MFER parsing** if possible. <br>π« **Mitigation**: Isolate systems processing biomedical signals. <br>π **Block**: Restrict network access to the service if it processes untrusted MFER files.