UBUNTU-CVE-2020-36843
- Source
- https://ubuntu.com/security/CVE-2020-36843
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36843.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-36843
- Upstream
- Published
- 2025-03-13T06:15:00Z
- Modified
- 2025-07-14T07:00:31.171108Z
- Severity
-
- 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.
- References
Affected packages
Ubuntu:Pro:20.04:LTS / ruby-ed25519
Package
- Name
- ruby-ed25519
- Purl
- pkg:deb/ubuntu/ruby-ed25519@1.2.4-1build1?arch=source&distro=esm-apps/focal
Ubuntu:22.04:LTS / ruby-ed25519
Package
- Name
- ruby-ed25519
- Purl
- pkg:deb/ubuntu/ruby-ed25519@1.3.0+ds-1?arch=source&distro=jammy
Ubuntu:24.04:LTS / ruby-ed25519
Package
- Name
- ruby-ed25519
- Purl
- pkg:deb/ubuntu/ruby-ed25519@1.3.0+ds-1build4?arch=source&distro=noble
Ubuntu:25.04 / libeddsa-java
Package
- Name
- libeddsa-java
- Purl
- pkg:deb/ubuntu/libeddsa-java@0.3.0-2?arch=source&distro=plucky