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Darknet (.cfg/.weights) Memory Corruption PoC

CWE-787/CWE-122: numload heap-buffer-overflow WRITE + OOB READ via route/shortcut

Bug 1: numload heap-overflow WRITE (headline)

filters=2 allocates 8-byte l.biases. numload=4096 rebinds l.n at weight-load time. fread(l.biases, sizeof(float), l.n=4096, fp) writes 16384 bytes into 8-byte buffer.

Bug 2/3: route/shortcut unbounded layer index -> OOB READ

layers=100000 or from=99999 indexes net->layers[] with no bounds check. Live in AlexeyAB/darknet (~21k stars).

Files

evil_numload.cfg + evil.weights -> Bug 1
evil_route.cfg -> Bug 2
evil_shortcut.cfg -> Bug 3

Build & Run

# Clone pjreddie/darknet, build with ASAN
gcc -g -O0 -fsanitize=address src/*.c harness.c -Iinclude -Isrc -o harness
./harness evil_numload.cfg evil.weights  # heap-buffer-overflow WRITE
./harness evil_route.cfg                 # SEGV READ
./harness evil_shortcut.cfg              # SEGV READ

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