{"answers":{"affected":"4 open source packages ship an affected version, including @openzeppelin/contracts and @openzeppelin/contracts-upgradeable. It affects 2 products.","exploited":"There is no known exploitation of CVE-2023-34234 in the wild and no public exploit code.","fix":"Upgrade @openzeppelin/contracts to 4.9.1 or later.","what":"CVE-2023-34234 is a medium-severity vulnerability in openzeppelin-contracts, published on 7 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-34234 and fix it if it is affected.\n\nWhat it is: CVE-2023-34234 is a medium-severity vulnerability in openzeppelin-contracts, published on 7 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-34234 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @openzeppelin/contracts (npm): affected from 4.3.0; fixed in 4.9.1\n- @openzeppelin/contracts (npm): affected from 4.3.0; fixed in 4.9.1\n- @openzeppelin/contracts-upgradeable (npm): affected from 4.3.0; fixed in 4.9.1\n- @openzeppelin/contracts-upgradeable (npm): affected from 4.3.0; fixed in 4.9.1\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-2023-34234/ (Markdown: https://insights.sbomify.com/CVE-2023-34234/index.md)","id":"CVE-2023-34234","markdown":"https://insights.sbomify.com/CVE-2023-34234/index.md","name":"CVE-2023-34234","record":{"aliases":["GHSA-5h3x-9wvq-w4m2"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Smart contract library","requires_auth":"none","summary":"Attackers can frontrun proposal creation to block governance actions or gain proposer privileges in OpenZeppelin smart contracts.","user_interaction":"not_required","vuln_class":"business_logic"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"contracts","vendor":"openzeppelin"},{"product":"contracts_upgradeable","vendor":"openzeppelin"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"description":"OpenZeppelin Contracts is a library for smart contract development. By frontrunning the creation of a proposal, an attacker can become the proposer and gain the ability to cancel it. The attacker can do this repeatedly to try to prevent a proposal from being proposed at all. This impacts the `Governor` contract in v4.9.0 only, and the `GovernorCompatibilityBravo` contract since v4.3.0. This problem has been patched in 4.9.1 by introducing opt-in frontrunning protection. Users are advised to upgrade. Users unable to upgrade may submit the proposal creation transaction to an endpoint with frontrunning protection as a workaround.","ecosystems":["npm"],"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":"Governor proposal creation may be blocked by frontrunning in OpenZeppelin","id":"CVE-2023-34234","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"business_logic","year":"2023"},"n_packages":4,"n_references":2,"next":{"headline":"Leaking sensitive user information still possible by filtering on private with prefix fields","id":"CVE-2023-34235"},"packages":[{"ecosystem":"npm","fixed":["4.9.1"],"introduced":["4.3.0"],"last_affected":[],"package":"@openzeppelin/contracts","purl":null,"source":"GHSA-5h3x-9wvq-w4m2"},{"ecosystem":"npm","fixed":["4.9.1"],"introduced":["4.3.0"],"last_affected":[],"package":"@openzeppelin/contracts","purl":"pkg:npm/%40openzeppelin/contracts","source":"GHSA-5h3x-9wvq-w4m2"},{"ecosystem":"npm","fixed":["4.9.1"],"introduced":["4.3.0"],"last_affected":[],"package":"@openzeppelin/contracts-upgradeable","purl":null,"source":"GHSA-5h3x-9wvq-w4m2"},{"ecosystem":"npm","fixed":["4.9.1"],"introduced":["4.3.0"],"last_affected":[],"package":"@openzeppelin/contracts-upgradeable","purl":"pkg:npm/%40openzeppelin/contracts-upgradeable","source":"GHSA-5h3x-9wvq-w4m2"}],"prev":{"headline":"Snowflake Python Connector vulnerable to Command Injection","id":"CVE-2023-34233"},"products":["openzeppelin-contracts"],"published":"2023-06-07","related":[{"cvss_score":10,"headline":"TimelockController vulnerability in OpenZeppelin Contracts","id":"CVE-2021-39167","kev_date_added":null,"published":"2021-08-26"},{"cvss_score":10,"headline":"TimelockController vulnerability in OpenZeppelin Contracts","id":"CVE-2021-39168","kev_date_added":null,"published":"2021-08-26"},{"cvss_score":9.8,"headline":"UUPSUpgradeable vulnerability in OpenZeppelin Contracts","id":"CVE-2021-41264","kev_date_added":null,"published":"2021-11-12"},{"cvss_score":7.9,"headline":"ECDSA signature malleability in OpenZeppelin Contracts","id":"CVE-2022-35961","kev_date_added":null,"published":"2022-08-14"},{"cvss_score":7.5,"headline":"GovernorVotesQuorumFraction updates to quorum may affect past defeated proposals in @openzeppelin/contracts","id":"CVE-2022-31198","kev_date_added":null,"published":"2022-08-01"},{"cvss_score":7.5,"headline":"OpenZeppelin Contracts's ERC165Checker may revert instead of returning false","id":"CVE-2022-31170","kev_date_added":null,"published":"2022-07-21"},{"cvss_score":7.5,"headline":"OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers","id":"CVE-2022-31172","kev_date_added":null,"published":"2022-07-21"}],"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":"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-02-06","vendors":["OpenZeppelin"]},"summary":"Attackers can frontrun proposal creation to block governance actions or gain proposer privileges in OpenZeppelin smart contracts.","url":"https://insights.sbomify.com/CVE-2023-34234/"}