Vulnerability Details : 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.
Products affected by CVE-2020-15093
- cpe:2.3:a:amazon:tough:*:*:*:*:*:rust:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-15093
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 47 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-15093
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
8.6
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |
3.9
|
4.0
|
NIST | |
8.6
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |
3.9
|
4.0
|
GitHub, Inc. |
CWE ids for CVE-2020-15093
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2020-15093
-
https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49
Improper uniqueness verification of signature threshold · Advisory · awslabs/tough · GitHubThird Party Advisory
-
https://crates.io/crates/tough
tough - crates.io: Rust Package RegistryThird Party Advisory
-
https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e
Merge pull request #974 from lukpueh/fix-signature-threshold · theupdateframework/tuf@2977188 · GitHubPatch;Third Party Advisory
-
https://github.com/theupdateframework/tuf/pull/974
Fix signature threshold by lukpueh · Pull Request #974 · theupdateframework/tuf · GitHubIssue Tracking;Patch;Third Party Advisory
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