CVE-2020-15093 - CVE House

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Status published High CVE-2020-15093

Improper verification of signature threshold in tough

8.6 CVSS

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

awslabs

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Affected Software

tough

Vulnerable Versions:

< 0.7.1

Timeline

Official Publish: July 9th, 2020

Last Modified: August 4th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1553 Subvert Trust Controls

Defense Evasion

T1190 Exploit Public-Facing Application

T1078 Valid Accounts

T1550 Use Alternate Authentication Material

Defense Evasion

T1565 Data Manipulation