{"answers":{"affected":"4 open source packages ship an affected version, including net.i2p.crypto:eddsa and net.i2p:i2p.","exploited":"There is no known exploitation of CVE-2020-36843 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2020-36843 is a medium-severity vulnerability in str4d ed25519-java, published on 13 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-36843 and fix it if it is affected.\n\nWhat it is: CVE-2020-36843 is a medium-severity vulnerability in str4d ed25519-java, published on 13 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-36843 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- net.i2p.crypto:eddsa (Maven): affected all versions up to 0.3.0; no fix listed\n- net.i2p.crypto:eddsa (Maven): affected all versions up to 0.3.0; no fix listed\n- net.i2p:i2p (Maven): affected all versions; fixed in 0.9.39\n- net.i2p:i2p (Maven): affected all versions; fixed in 0.9.39\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-36843/ (Markdown: https://insights.sbomify.com/CVE-2020-36843/index.md)","id":"CVE-2020-36843","markdown":"https://insights.sbomify.com/CVE-2020-36843/index.md","name":"CVE-2020-36843","record":{"aliases":["AZL-73250","CLSA-2026-1770682157","DEBIAN-CVE-2020-36843","GHSA-p53j-g8pw-4w5f","MINI-65fc-pwc9-fjh6","MINI-mqwq-7r2q-x4rp","MINI-qvjx-q843-qhm7","MINI-rxc8-vx2f-w77j","MINI-w353-hhqg-f5vm","MINI-x4v6-2mrj-mhf2","OESA-2025-1334","SUSE-SU-2025:1029-1","UBUNTU-CVE-2020-36843","openSUSE-SU-2025:14892-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Java EdDSA library","requires_auth":"none","summary":"Attackers can generate alternative valid signatures for known messages due to signature malleability in the EdDSA-Java library, bypassing strict signature verification.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"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.","ecosystems":["Maven","SUSE:Enterprise Storage 7.1","SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS","SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","SUSE:Linux Enterprise Module for Development Tools 15 SP6","SUSE:Linux Enterprise Server 15 SP3-LTSS","SUSE:Linux Enterprise Server 15 SP4-LTSS","SUSE:Linux Enterprise Server 15 SP5-LTSS","SUSE:Linux Enterprise Server for SAP Applications 15 SP3","SUSE:Linux Enterprise Server for SAP Applications 15 SP4","SUSE:Linux Enterprise Server for SAP Applications 15 SP5","openSUSE:Leap 15.6","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Ed25519 Signature Malleability in ed25519-java Due to Missing Scalar Range Check","id":"CVE-2020-36843","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"weak_cryptography","year":"2020"},"n_packages":19,"n_references":2,"next":{"headline":"Cross-site scripting in Security Awareness Training","id":"CVE-2020-36844"},"packages":[{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":["0.3.0"],"package":"net.i2p.crypto:eddsa","purl":null,"source":"GHSA-p53j-g8pw-4w5f"},{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":["0.3.0"],"package":"net.i2p.crypto:eddsa","purl":"pkg:maven/net.i2p.crypto/eddsa","source":"GHSA-p53j-g8pw-4w5f"},{"ecosystem":"Maven","fixed":["0.9.39"],"introduced":["0"],"last_affected":[],"package":"net.i2p:i2p","purl":null,"source":"GHSA-p53j-g8pw-4w5f"},{"ecosystem":"Maven","fixed":["0.9.39"],"introduced":["0"],"last_affected":[],"package":"net.i2p:i2p","purl":"pkg:maven/net.i2p/i2p","source":"GHSA-p53j-g8pw-4w5f"},{"ecosystem":"SUSE:Enterprise Storage 7.1","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Enterprise%20Storage%207.1","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Development Tools 15 SP6","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP3-LTSS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP4-LTSS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP5-LTSS","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSS","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP3","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP4","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP5","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/suse/ed25519-java\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"openSUSE:Leap 15.6","fixed":["0.3.0-150200.5.9.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/opensuse/ed25519-java\u0026distro=openSUSE%20Leap%2015.6","source":"SUSE-SU-2025:1029-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.3.0-6.1"],"introduced":["0"],"last_affected":[],"package":"ed25519-java","purl":"pkg:rpm/opensuse/ed25519-java\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2025:14892-1"}],"prev":{"headline":"Migration, Backup, Staging – WPvivid \u003c= 0.9.35 - Authenticated (Subscriber+) Arbitrary File Upload","id":"CVE-2020-36842"},"products":["ed25519-java"],"published":"2025-03-13","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-03-18","vendors":["str4d"]},"summary":"Attackers can generate alternative valid signatures for known messages due to signature malleability in the EdDSA-Java library, bypassing strict signature verification.","url":"https://insights.sbomify.com/CVE-2020-36843/"}