{"answers":{"affected":"8 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-2024-27094 in the wild and no public exploit code.","fix":"Upgrade @openzeppelin/contracts to a fixed version for your release line: 4.9.6 or 5.0.2.","what":"CVE-2024-27094 is a medium-severity vulnerability in openzeppelin-contracts, published on 29 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-27094 and fix it if it is affected.\n\nWhat it is: CVE-2024-27094 is a medium-severity vulnerability in openzeppelin-contracts, published on 29 Feb 2024. 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-2024-27094 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @openzeppelin/contracts (npm): affected from 4.5.0; fixed in 4.9.6\n- @openzeppelin/contracts (npm): affected from 4.5.0; fixed in 4.9.6\n- @openzeppelin/contracts (npm): affected from 5.0.0-rc.0; fixed in 5.0.2\n- @openzeppelin/contracts (npm): affected from 5.0.0-rc.0; fixed in 5.0.2\n- @openzeppelin/contracts-upgradeable (npm): affected from 4.5.0; fixed in 4.9.6\n- @openzeppelin/contracts-upgradeable (npm): affected from 4.5.0; fixed in 4.9.6\n- @openzeppelin/contracts-upgradeable (npm): affected from 5.0.0-rc.0; fixed in 5.0.2\n- @openzeppelin/contracts-upgradeable (npm): affected from 5.0.0-rc.0; fixed in 5.0.2\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-2024-27094/ (Markdown: https://insights.sbomify.com/CVE-2024-27094/index.md)","id":"CVE-2024-27094","markdown":"https://insights.sbomify.com/CVE-2024-27094/index.md","name":"CVE-2024-27094","record":{"aliases":["GHSA-9vx6-7xxf-x967"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Smart contract library","requires_auth":"none","summary":"Attackers can read potentially dirty memory beyond input buffers in Base64 encoding, exposing sensitive data in smart contracts.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"contracts","vendor":"openzeppelin"},{"product":"contracts_upgradeable","vendor":"openzeppelin"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6.","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":"OpenZeppelin Contracts base64 encoding may read from potentially dirty memory","id":"CVE-2024-27094","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"information_disclosure","year":"2024"},"n_packages":8,"n_references":5,"next":{"headline":"Decidim cross-site scripting (XSS) in the admin panel","id":"CVE-2024-27095"},"packages":[{"ecosystem":"npm","fixed":["4.9.6"],"introduced":["4.5.0"],"last_affected":[],"package":"@openzeppelin/contracts","purl":null,"source":"GHSA-9vx6-7xxf-x967"},{"ecosystem":"npm","fixed":["4.9.6"],"introduced":["4.5.0"],"last_affected":[],"package":"@openzeppelin/contracts","purl":"pkg:npm/%40openzeppelin/contracts","source":"GHSA-9vx6-7xxf-x967"},{"ecosystem":"npm","fixed":["5.0.2"],"introduced":["5.0.0-rc.0"],"last_affected":[],"package":"@openzeppelin/contracts","purl":null,"source":"GHSA-9vx6-7xxf-x967"},{"ecosystem":"npm","fixed":["5.0.2"],"introduced":["5.0.0-rc.0"],"last_affected":[],"package":"@openzeppelin/contracts","purl":"pkg:npm/%40openzeppelin/contracts","source":"GHSA-9vx6-7xxf-x967"},{"ecosystem":"npm","fixed":["4.9.6"],"introduced":["4.5.0"],"last_affected":[],"package":"@openzeppelin/contracts-upgradeable","purl":null,"source":"GHSA-9vx6-7xxf-x967"},{"ecosystem":"npm","fixed":["4.9.6"],"introduced":["4.5.0"],"last_affected":[],"package":"@openzeppelin/contracts-upgradeable","purl":"pkg:npm/%40openzeppelin/contracts-upgradeable","source":"GHSA-9vx6-7xxf-x967"},{"ecosystem":"npm","fixed":["5.0.2"],"introduced":["5.0.0-rc.0"],"last_affected":[],"package":"@openzeppelin/contracts-upgradeable","purl":null,"source":"GHSA-9vx6-7xxf-x967"},{"ecosystem":"npm","fixed":["5.0.2"],"introduced":["5.0.0-rc.0"],"last_affected":[],"package":"@openzeppelin/contracts-upgradeable","purl":"pkg:npm/%40openzeppelin/contracts-upgradeable","source":"GHSA-9vx6-7xxf-x967"}],"prev":{"headline":"Minder trusts client-provided mapping from repo name to upstream ID","id":"CVE-2024-27093"},"products":["openzeppelin-contracts"],"published":"2024-02-29","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-08-02","vendors":["OpenZeppelin"]},"summary":"Attackers can read potentially dirty memory beyond input buffers in Base64 encoding, exposing sensitive data in smart contracts.","url":"https://insights.sbomify.com/CVE-2024-27094/"}