这个是一个pwn的题目,图片是他的内容,帮我解答

Creado el: 16 de mayo de 2026

Respondido usando GPT-5.5 Thinking por Chat01

Pregunta

attachment-55.zip
{F6950F4B-488E-425D-97DE-E19765DDBDC9}.png

这个是一个pwn的题目,图片是他的内容,帮我解答

Pensamiento

Provide exploit and important details in Chinese

I’ll include the final exploit instructions and necessary details in Chinese, like the key offset values and necessary functions. I’ll also clarify that the service says “ConnectionRefused” on my end, and note that if the service is running, the user can run the script and retrieve the flag. I’ll provide the exploit and explain some transformations, like how a certain function removes hyphens and applies a Caesar shift. No citations needed here.

Thought for 2m 56s

Respuesta

我看了附件,思路是典型 UAF/tcache + canary leak + ret2libc

关键点:

  1. 第一关 token func2() 里先 malloc(0x48),写入 hackfree,再按你输入的长度重新 malloc
    输入长度 72,就能复用同一个 tcache chunk,再输入 hack,即可把全局变量 secret 置为 0x378

  2. 第二关栈溢出 func3() 中:

    c
    read(0, buf, 0x49); printf("%s.congratulate to you", buf); read(0, buf, 0x49);

    buf 到 canary 距离是 24 字节。第一次发送 25 字节覆盖 canary 低位 \x00,通过 %s 泄露剩余 7 字节 canary。

  3. ROP 第一次 ROP 泄露 puts@got,算 libc base。
    第二次回到 func3(),用:

    text
    ret; pop rdi; "/bin/sh"; system

    getshell。

  4. 正常流程门槛 如果不走 ROP,func_gate() 的整数是:

    text
    2024026860

我这边尝试连 39.96.193.120:10007 时返回了 ConnectionRefused,所以没法直接帮你把远程 flag 读出来。但 exploit 已经写好了,服务开着时直接跑即可。

下载脚本:
exp_entrance.py

使用方式:

bash
unzip attachment-55.zip cd 解压目录 python3 exp_entrance.py

getshell 后执行:

bash
cat /flag cat flag cat flag.txt

如果缺少 pwntools:

bash
pip3 install pwntools

Pregunta

attachment-63.zip
{C6843337-2E78-463E-8C82-C78948EEF664}.png

解答这个rever题目,图片是描述

Pensamiento

bash -lc cat > /mnt/data/rev63_solver.py <<'PY'

Solver / payload generator for Conway's Trap.exe

It reconstructs the traps from the binary and emits one valid stdin payload.

def rol(x,n): return ((x << n) | (x >> (8-n))) & 0xff

def ror(x,n): return ((x >> n) | (x << (8-n))) & 0xff

def step(a): a = list(a) x = [0]*16 for i in range(0, 16, 2): s = (a[i] + a[i+1]) & 0xff x[i] = s x[i+1] = rol(s ^ a[i+1], 1) return x[1:] + x[:1]

def verify_seed(seed): a = list(seed) for _ in range(5): a = step(a) return bytes(a[5:16]).hex() == 'df7b6a5d4da0f5facf32c4'

def hidden_check(seed, inner): enc = bytes.fromhex('4cc76be36d043ea4fe7a9c442190237490aa412ed84585') target = bytes(b ^ 0xcc for b in enc) for i in range(23): v = seed[i & 0xf] ^ inner[i] v = (v + ((i * 0x17) & 0xff)) & 0xff v = rol(v, 3) ^ 0xaa if v != target[i]: return False return True

seed = bytes.fromhex('4b9517a0b268c61096efe7cfc101823c') inner = bytes.fromhex('0e8864cbb7b147a7cd5b9e8815b2e4d5258751f4b9e944') flag = b'ISCC{' + inner + b'}'

print('seed =', seed.hex()) print('flag bytes hex =', flag.hex()) print('flag repr =', repr(flag)) print('seed first-stage check =', verify_seed(seed)) print('hidden flag check =', hidden_check(seed, inner))

payload = seed.hex().encode() + b'\n' + flag + b'\n' open('/mnt/data/rev63_payload.bin', 'wb').write(payload) print('wrote /mnt/data/rev63_payload.bin') PY python3 /mnt/data/rev63_solver.py && python3 - <<'PY' from pathlib import Path p=Path('/mnt/data/rev63_payload.bin').read_bytes() print(p.hex()) PY

Thought for 9m 30s

Respuesta

解出来的一组可通过隐藏校验的输入如下。

seed:

text
4b9517a0b268c61096efe7cfc101823c

flag 不是普通可打印字符串,中间有不可打印字节,不能手敲。完整 flag 的十六进制是:

text
495343437b0e8864cbb7b147a7cd5b9e8815b2e4d5258751f4b9e9447d

也就是:

python
b'ISCC{\x0e\x88d\xcb\xb7\xb1G\xa7\xcd[\x9e\x88\x15\xb2\xe4\xd5%\x87Q\xf4\xb9\xe9D}'

我给你生成好了 payload,直接重定向输入即可:

下载 rev63_payload.bin

运行方式:

bash
Conway's\ Trap.exe < rev63_payload.bin

或者用这个脚本重新生成 payload:

下载 rev63_solver.py

核心坑点:

  1. seed 要求 32 个 hex 字符,转成 16 字节后做 5 轮变换。
  2. seed 校验里从变换结果的偏移 5 开始取 16 字节,存在越界读,是第一层坑。
  3. flag 格式必须是 ISCC{...},内部长度为 23
  4. 真正的 flag 校验不在表面那个长字符串比较里,而是通过 int3 + VEH 跳到隐藏函数 0x401d00
  5. 表面上的 Correct format! But wrong content. 是假路径。真正通过后会打印:
text
Win! You have found the true flag. Congratulations! You have found the true flag.

Pregunta

app-release.apk
{E80BE7BF-BCE2-4BB6-A480-C55FDD02788A}.png

解答这个mobile题目

Pensamiento

Providing concise answer in Chinese with flag

The user requested a solution and flag in Chinese. A clear and concise answer is necessary, without over-complicating it. I’ll mention the solving steps and flag (ISCC{paw_r0u7e_cod3_qiv}). To be helpful, I could include the correct click order (XX FD AV DF GV VX) and maybe provide a minimal solver script without unnecessary complications. Let’s ensure the response is focused and direct.

Thought for 6m 25s

Respuesta

解出来了。

最终 flag:

text
ISCC{paw_r0u7e_cod3_qiv}

APP 里需要点击的猫盘顺序:

text
XX FD AV DF GV VX

也就是按 6×6 表格点击这些 emoji:

text
🐾 → 🦋 → 🌿 → ☀️ → 😿 → 🐈‍⬛

对应完整路径字符串:

text
XXFDAVDFGVVX

这个字符串的 MD5 正好是 Java 层校验值:

text
6f020dd49c3249be42d0f4b81802f2f7

核心过程:

  1. Java 层 _B._g()0x42 异或还原出 flag 前缀 ISCC{,并要求结尾是 }
  2. 6×6 猫盘的坐标顺序不是标准 ADFGVX,而是:
text
X F A D G V
  1. assets/sys/OBSERVER_PROTOCOL 是十六进制文本,解码后给出坐标约束;结合 MD5 校验可得到路径:
text
XXFDAVDFGVVX
  1. hint.png 的蓝色通道 LSB 隐写出 MEOW 魔数和 256 字节 S-box。
  2. native 层用路径生成 AES-256 key,再解密校验密文,得到内部明文:
text
paw_r0u7e_cod3_qiv

所以完整提交就是:

text
ISCC{paw_r0u7e_cod3_qiv}

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