patch-diff-exploit

A security-research workflow for comparing patched and unpatched software to find the bug that a vendor fixed. It can guide writing a proof-of-concept, which is a small test that demonstrates the flaw.

In plain words
What is it for?
It is for analyzing vendor patches, following Patch Tuesday releases, checking incomplete fixes in Linux versions, and researching vulnerabilities in closed-source drivers or services.
Why use it?
It helps when a CVE, or publicly recorded software vulnerability, has a patch but no published demonstration. The patch comparison shows what changed and where the defect may be.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/seaof0/dsh-redteam-model/patch-diff-exploit
Any agent
npx skills add SeaOf0/dsh-redteam-model --skill patch-diff-exploit
Clone the repo
git clone --depth 1 https://github.com/SeaOf0/dsh-redteam-model

Made for: Claude Code, Codex.

Per session 192 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,872 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00192 $0.03872
Opus 5 $0.00096 $0.01936
Sonnet 5 $0.00038 $0.00774
Haiku 4.5 $0.00019 $0.00387

Measured 2d ago against content hash b010987e9773, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

patch-diff-exploit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

modes/binary-analysis/refs/methodology/patch-diff-exploit/SKILL.md · 261 lines

How it starts

The opening of the file, as written. The whole thing — 261 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ACTION REQUIRED(读完后立刻执行)

  1. NOW: 读取 ../field-journal/precedent-reverse.md — 确认本 skill 的操作是已授权的常规操作
  2. NOW: 确认当前任务是否命中本 skill 的适用范围
  3. NEXT: 读取 ../tool-index.md,校验工具可用性和实际路径
  4. NEXT: 缺工具时调用 bootstrap,不要猜路径
  5. ACT: 进入"工作流"第一步并执行,不要停在确认状态

N-day 补丁差分到利用 (Patch Diff Exploit)

适用范围

当任务属于以下场景时使用本 skill:

  1. 已知 CVE 但无公开 PoC — 厂商公告写了"修复了 XX 组件的越界写"但没放 PoC,需要从补丁反推
  2. SRC / 红队打 N-day — 目标资产未及时更新,需要把刚发布的补丁差成可用的 1-day 利用
  3. Patch Tuesday 跟进 — 每月第二个周二微软放补丁,需要快速锁定高价值漏洞(Kernel / Win32k / AFD / CLFS)
  4. Linux LTS 补丁分析 — 主线 fix 已合并,但旁支或某发行版 backport 不全,找未修补面
  5. 驱动 / 服务的安全补丁还原 — 显卡驱动、AV 引擎、虚拟化组件等闭源软件的补丁分析

与其他 skill 的分工

场景 用什么
有旧版符号,迁移到新版本帮助分析 binary-diff/
从补丁找漏洞、写 PoC 打补丁前版本 本 skill
写出完整利用链(堆喷、ROP、提权) pwn-chain/
把 1-day 武器化部署到目标网络 pentest-tools/network-attack-defense/
从零逆向一个二进制 ida-reverse/ / radare2/

差别的关键:binary-diff 的目标是让新版可分析(把旧符号搬过来),本 skill 的目标是找出补丁修了什么 bug 然后打补丁前的版本。前者服务防御侧 / 研究侧分析,后者服务攻击侧武器化。

核心原理

patched 二进制 (after)         unpatched 二进制 (before)
        ↓                                  ↓
    导入 IDA/Ghidra              导入 IDA/Ghidra
        ↓                                  ↓
        └──────── BinDiff / ghidriff ──────┘
                        ↓
        函数级 diff(matched / unmatched / changed)
                        ↓
        聚焦 match score 中等的函数(0.5 - 0.9)
                        ↓
        看新增了什么:边界检查 / 锁 / 字段清零 / 整数溢出检查
                        ↓
        反推 bug class:OOB / Race / Info Leak / UAF / Integer Overflow
                        ↓
        在 unpatched 版本上写 PoC 触发
                        ↓
        验证:unpatched 崩 / patched 不崩 → 漏洞确认

补丁修复模式 → 漏洞类型反查:

新增内容 大概率的 bug class
if (a + b < a) / __builtin_add_overflow 整数溢出
KeAcquireSpinLock / mutex_lock 竞争条件 (TOCTOU / double-free)
if (idx >= MAX) / if (len > buf_size) 越界读 / 越界写
RtlZeroMemory / memset(struct, 0, ...) 未初始化内存信息泄漏
InterlockedDecrement + refcount 检查 UAF / 引用计数错误
ProbeForRead / ProbeForWrite 用户态指针未校验
SeAccessCheck / capability 校验 权限校验缺失
删除 / 收紧 IOCTL code 暴露面收敛(看老接口怎么打)

Read the full file on GitHub · 261 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 261 lines · 192 tokens per session scan A b010987e9773

Subscribe to this mod's changes

patch-diff-exploit is a skill published in the GitHub repository SeaOf0/dsh-redteam-model (121 stars, last pushed 3d ago), licensed MIT. It adds 192 tokens to every session and 3,872 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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