CVE-2020-15093— Improper verification of signature threshold in tough
Quick assessment
Affected
awslabs tough
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
tough library是一款用于使用和生成TUF存储库的工具。 tough library (Rust/crates.io) 0.7.1之前版本中存在数据伪造问题漏洞，该漏洞源于程序未正确验证加密签名的阈值。攻击者可利用该漏洞复制有效签名，绕过更新框架(TUF)的保护（在认定元数据有效之前，要求唯一签名的最小阈值）。
Possible ATT&CK Techniques 2 AI
T1550 · Use Alternate Authentication Material T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-15093
Vulnerability Information
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Vulnerability Title
Improper verification of signature threshold in tough
Source: CVE Program / CVE List V5
Vulnerability Description
The tough library (Rust/crates.io) prior to version 0.7.1 does not properly verify the threshold of cryptographic signatures. It allows an attacker to duplicate a valid signature in order to circumvent TUF requiring a minimum threshold of unique signatures before the metadata is considered valid. A fix is available in version 0.7.1. CVE-2020-6174 is assigned to the same vulnerability in the TUF reference implementation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
tough library 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
tough library是一款用于使用和生成TUF存储库的工具。 tough library (Rust/crates.io) 0.7.1之前版本中存在数据伪造问题漏洞，该漏洞源于程序未正确验证加密签名的阈值。攻击者可利用该漏洞复制有效签名，绕过更新框架(TUF)的保护（在认定元数据有效之前，要求唯一签名的最小阈值）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2020-15093
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Patches & Fixes for CVE-2020-15093 (2)
-
https://github.com/theupdateframework/tuf/pull/974 x_refsource_MISC
Other References for CVE-2020-15093 (1)
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https://crates.io/crates/tough x_refsource_MISC
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V. Comments for CVE-2020-15093
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