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学习笔记 metric = 用来“评价好坏/高低/风险”的标准

  • 2026-04-18 10:22:26
学习笔记 metric = 用来“评价好坏/高低/风险”的标准

Fuzzing generates a large number of crashing inputs, and given a constant influx of new crashes, it is impractical to perform root-cause analysis and exploitability assessment for each one.

🔍 拆解

  • Fuzzing generates
    👉 模糊测试会产生
  • a large number of crashing inputs
    👉 大量导致崩溃的输入
  • given a constant influx of new crashes
    👉 考虑到持续不断的新崩溃出现
  • it is impractical to perform
    👉 做…是不现实的
  • root-cause analysis
    👉 根因分析
  • exploitability assessment
    👉 可利用性评估


👉 模糊测试会产生大量导致崩溃的输入,而由于新的崩溃不断出现,对每一个崩溃都进行根因分析和可利用性评估是不现实的。


🔥 英语重点句型

👉it is impractical to do…= 做某事不现实


🔹 

Prior work assesses severity based on reachability (the range that can be read or written via memory-safety bugs), but cannot distinguish cases where severity differs greatly despite having similar reachability.


🔍 拆解

  • Prior work👉 以往研究
  • assesses severity based on reachability
    👉 基于可达性评估严重性
  • the range that can be read or written
    👉 可以被读/写的范围
  • via memory-safety bugs
    👉 通过内存安全漏洞
  • cannot distinguish cases
    👉 无法区分情况
  • where severity differs greatly
    👉 严重性差异很大
  • despite having similar reachability
    👉 尽管可达性相似

✅ 翻译

👉 以往研究基于可达性(即通过内存安全漏洞可读写的范围)来评估漏洞严重性,但无法区分那些虽然可达性相似但严重性差异很大的情况。


🔥 重点表达

👉despite + 名词 / 动名词= 尽管…


🔹 第三句(核心创新)

We instead measure controllability: how freely an attacker can steer the next invalid access target within the reachable range.


🔍 拆解

  • We instead measure👉 我们改为衡量
  • controllability👉 可控性
  • how freely👉 多么自由地
  • an attacker can steer👉 攻击者可以操控
  • the next invalid access target👉 下一次非法访问目标
  • within the reachable range👉 在可达范围内

✅ 翻译

👉 我们转而衡量“可控性”:即攻击者在可达范围内能够多自由地操控下一次非法访问目标。


🔥 重点表达

👉how + 副词= 表示程度

例:

  • how easily → 多容易
  • how freely → 多自由


From diversified crashing inputs, we build a first-order Markov chain over ASan-reported access offsets and score bugs by the trajectory entropy of the chain.


🔍 拆解

  • From diversified crashing inputs
    👉 从多样化的崩溃输入中
  • we build a first-order Markov chain
    👉 我们构建一阶马尔可夫链
  • over ASan-reported access offsets
    👉 基于 ASan 报告的访问偏移
  • score bugs👉 对漏洞打分
  • by the trajectory entropy
    👉 根据轨迹熵
  • of the chain👉 (马尔可夫链的)


👉 我们从多样化的崩溃输入中,基于 ASan 报告的访问偏移构建一阶马尔可夫链,并通过该链的轨迹熵对漏洞进行评分。


🔥 技术表达

👉build a model over X  基于 X 构建模型



In a preliminary study on known CVEs, the entropy score is higher for bugs with higher controllability and separates vulnerabilities that reachability-based metrics fail to distinguish.


🔍 拆解

  • In a preliminary study👉 在初步研究中
  • on known CVEs👉 针对已知 CVE
  • entropy score is higher👉 熵评分更高
  • for bugs with higher controllability
  • 👉 对于可控性更高的漏洞
  • separates vulnerabilities👉 区分漏洞
  • that reachability-based metrics fail to distinguish
    👉 可达性指标无法区分的

👉 在对已知 CVE 的初步研究中,可控性更高的漏洞具有更高的熵评分,并且该方法能够区分那些基于可达性指标无法区分的漏洞。



Controllability provides a better measure of exploitability than reachability.



👉“可控性比可达性更能反映漏洞是否真的危险”

最常见 5 种用法


1️⃣ X-based metric👉 基于某种方法的指标

例:

  • entropy-based metric
    👉 基于熵的指标
  • performance-based metrics
    👉 基于性能的指标

2️⃣ evaluation metrics👉 评估指标

例:

We use several evaluation metrics.

👉 我们使用多个评估指标


3️⃣ metric for …👉 用于…的指标

例:a metric for exploitability

👉 用于评估可利用性的指标


4️⃣ metric measures …👉 指标衡量什么

例:This metric measures controllability.

👉 该指标衡量可控性


5️⃣ metrics fail to …👉 指标无法做到…(论文常用)

metrics fail to distinguish vulnerabilities

👉 指标无法区分漏洞

在安全/编程中会常见的 metrics

表达含义
performance metrics性能指标
security metrics安全指标
accuracy metrics准确率指标
risk metrics风险指标
coverage metrics覆盖率指标(fuzzing 常见🔥)

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  1. CONNECT:[ UseTime:0.001030s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001447s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000715s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000777s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001402s ]
  6. SELECT * FROM `set` [ RunTime:0.000946s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001784s ]
  8. SELECT * FROM `article` WHERE `id` = 481789 LIMIT 1 [ RunTime:0.001266s ]
  9. UPDATE `article` SET `lasttime` = 1776493878 WHERE `id` = 481789 [ RunTime:0.010312s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000270s ]
  11. SELECT * FROM `article` WHERE `id` < 481789 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000451s ]
  12. SELECT * FROM `article` WHERE `id` > 481789 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000402s ]
  13. SELECT * FROM `article` WHERE `id` < 481789 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001295s ]
  14. SELECT * FROM `article` WHERE `id` < 481789 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001195s ]
  15. SELECT * FROM `article` WHERE `id` < 481789 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005746s ]
0.202409s