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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: A critical data forgery flaw in `sm-crypto` (SM2 decryption logic). <br>๐ฅ **Consequences**: Attackers can forge data, potentially leading to **private key recovery**. Total compromise of confidentiality!
Q2Root Cause? (CWE/Flaw)
๐ก๏ธ **Root Cause**: Flawed SM2 decryption logic. <br>๐ **CWE**: **CWE-345** (Insufficient Verification of Data Authenticity). The library fails to properly validate data integrity during decryption.
Q3Who is affected? (Versions/Components)
๐ฆ **Affected**: `sm-crypto` by **JuneAndGreen**. <br>๐ **Version**: All versions **prior to 0.3.14**. If you use an older version, you are at risk!
Q4What can hackers do? (Privileges/Data)
๐ **Attacker Actions**: <br>1. **Forge Data**: Manipulate encrypted payloads. <br>2. **Recover Keys**: Exploit the logic flaw to extract the **private key**. <br>3.โฆ
โก **Exploitation**: **Low Threshold**. <br>๐ **Network**: AV:N (Network exploitable). <br>๐ **Auth**: PR:N (No privileges required). <br>๐ **UI**: UI:N (No user interaction needed). <br>๐ **Easy to exploit remotely!**
Q6Is there a public Exp? (PoC/Wild Exploitation)
๐ **Public Exploit**: **No PoC provided** in the data. <br>โ ๏ธ **Risk**: Despite no public code, the CVSS score is **High (7.5+ implied by C:H/I:H)**. Assume it is exploitable by skilled attackers!
Q7How to self-check? (Features/Scanning)
๐ **Self-Check**: <br>1. Scan your `package.json` or dependencies. <br>2. Look for `sm-crypto` version **< 0.3.14**. <br>3. Check for usage of SM2 decryption functions in your codebase.
Q8Is it fixed officially? (Patch/Mitigation)
โ **Fixed**: **Yes**. <br>๐ง **Patch**: Upgrade to version **0.3.14** or later. <br>๐ **Reference**: See GitHub Advisory GHSA-pgx9-497m-6c4v for official details.
Q9What if no patch? (Workaround)
๐ **No Patch?**: <br>1. **Disable SM2 Decryption** if not strictly needed. <br>2. **Implement Application-Level Validation**: Manually verify data authenticity before processing. <br>3.โฆ