High severity · published Jul 9, 2020
CVE-2020-15093
The tough library (Rust/crates.io) prior to version 0.7.1 does not properly verify the threshold of cryptographic signatures
8.6
CVSS
1.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tough · Amazon
before 0.7.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15093
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15093
Third Party Advisory
https://crates.io/crates/tough
Third Party Advisory
https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49
Patch
https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e
Issue Tracking
https://github.com/theupdateframework/tuf/pull/974
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