CVE-2020-15093

Improper verification of signature threshold in tough

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.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.12%
Third-Party Advisory crates.io Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: awslabs tough
Published at:
Updated at:

References

Link Tags
https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49 third party advisory
https://crates.io/crates/tough third party advisory
https://github.com/theupdateframework/tuf/pull/974 issue tracking third party advisory patch
https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-15093?
CVE-2020-15093 has been scored as a high severity vulnerability.
How to fix CVE-2020-15093?
To fix CVE-2020-15093, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15093 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-15093 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-15093?
CVE-2020-15093 affects awslabs tough.
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