Vulnerability in Amazon Tough
CVE-2020-15093
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Amazon Tough
- Awslabs Tough — versions < 0.7.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49 (Third Party Advisory)
- crates.io/crates/tough (Third Party Advisory)
- github.com/theupdateframework/tuf/pull/974 (Patch, Third Party Advisory, Issue Tracking)
- github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15093?
- CVE-2020-15093 is a high-severity vulnerability in Amazon Tough, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.6/10. Published 2020-07-09.
- How severe is CVE-2020-15093?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2020-15093 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.