🛡️ Sentinel: [CRITICAL] Fix command injection in wifi iface.uc

[ManupaKDU]

🚨 Severity: CRITICAL
💡 Vulnerability: Command injection vulnerability in package/network/config/wifi-scripts/files-ucode/usr/share/ucode/wifi/iface.uc via fs.popen() string interpolation.
🎯 Impact: If num_global_macaddr or data.mbssid are attacker-controlled and contain shell metacharacters, an attacker could execute arbitrary code on the OpenWrt system via the fs.popen() call.
🔧 Fix: Added strict regex validation /[^0-9]/ to ensure num_global_macaddr, mac_idx, and data.mbssid only contain numeric digits before they are interpolated into the shell command string. (phy and macaddr_base were already validated by existing code).
✅ Verification: Run sh test_ci.sh to confirm no regressions and ensure no arbitrary strings can pass the numeric validation blocks.

Signed-off-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

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PR created automatically by Jules for task 17529185373719667317 started by @manupawickramasinghe

[google-labs-jules]

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