{"answers":{"affected":"3 open source packages ship an affected version, including github.com/tendermint/tendermint. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-15091 in the wild and no public exploit code.","fix":"Upgrade github.com/tendermint/tendermint to a fixed version for your release line: 0.33.6 or 0.34.0-dev1.0.20200702134149-480b995a3172.","what":"CVE-2020-15091 is a medium-severity denial of service vulnerability in tendermint, published on 2 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-15091 and fix it if it is affected.\n\nWhat it is: CVE-2020-15091 is a medium-severity denial of service vulnerability in tendermint, published on 2 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-15091 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/tendermint/tendermint (Go): affected all versions; fixed in 0.33.6\n- github.com/tendermint/tendermint (Go): affected all versions; fixed in 0.33.6\n- github.com/tendermint/tendermint (Go): affected from 0.33.0; fixed in 0.34.0-dev1.0.20200702134149-480b995a3172\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-2020-15091/ (Markdown: https://insights.sbomify.com/CVE-2020-15091/index.md)","id":"CVE-2020-15091","markdown":"https://insights.sbomify.com/CVE-2020-15091/index.md","name":"CVE-2020-15091","record":{"aliases":["GHSA-6jqj-f58p-mrw3","GO-2021-0090"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Tendermint consensus engine","requires_auth":"low_privilege","summary":"A malicious block proposer can halt the network by including signatures for the wrong block, affecting Tendermint consensus nodes.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"tendermint","vendor":"tendermint"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block. This may happen naturally if you start a network, have it run for some time and restart it (**without changing chainID**). A malicious block proposer (even with a minimal amount of stake) can use this vulnerability to completely halt the network. This issue is fixed in Tendermint 0.33.6 which checks all the signatures are for the block with 2/3+ majority before creating a commit.","ecosystems":["Go"],"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":"Denial of Service in TenderMint","id":"CVE-2020-15091","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":3,"n_references":3,"next":{"headline":"Stored XSS in TimelineJS3","id":"CVE-2020-15092"},"packages":[{"ecosystem":"Go","fixed":["0.33.6"],"introduced":["0"],"last_affected":[],"package":"github.com/tendermint/tendermint","purl":null,"source":"GHSA-6jqj-f58p-mrw3"},{"ecosystem":"Go","fixed":["0.33.6"],"introduced":["0"],"last_affected":[],"package":"github.com/tendermint/tendermint","purl":"pkg:golang/github.com/tendermint/tendermint","source":"GHSA-6jqj-f58p-mrw3"},{"ecosystem":"Go","fixed":["0.34.0-dev1.0.20200702134149-480b995a3172"],"introduced":["0.33.0"],"last_affected":[],"package":"github.com/tendermint/tendermint","purl":"pkg:golang/github.com/tendermint/tendermint","source":"GO-2021-0090"}],"prev":{"headline":"Privilege escalation in Presto","id":"CVE-2020-15087"},"products":["tendermint"],"published":"2020-07-02","related":[{"cvss_score":7.5,"headline":"Uncontrolled resource consumption in github.com/tendermint/tendermint","id":"CVE-2019-25072","kev_date_added":null,"published":"2022-12-27"},{"cvss_score":6.5,"headline":"Denial of service in TenderMint Core","id":"CVE-2021-21271","kev_date_added":null,"published":"2021-01-26"},{"cvss_score":3.1,"headline":"Denial of service in Tendermint","id":"CVE-2020-5303","kev_date_added":null,"published":"2020-04-10"}],"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":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["tendermint"]},"summary":"A malicious block proposer can halt the network by including signatures for the wrong block, affecting Tendermint consensus nodes.","url":"https://insights.sbomify.com/CVE-2020-15091/"}