CVE-2020-15093

Improper verification of signature threshold in tough

HIGH
8.6
CVSS Score
Published: July 9, 2020 at 06:45 PM UTC
Updated: June 17, 2026 at 02:56 AM UTC
2 products affected across 2 vendorsToughTough

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Severity
HIGH8.6
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.7.1
Affected range stops below 0.7.1, so it looks safe — our inference, not a vendor statement
v < 0.7.1
Affected range stops below 0.7.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

CVSS

8.6HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

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