{"answers":{"affected":"3 open source packages ship an affected version, including openzeppelin-cairo-contracts. It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-23940 in the wild and no public exploit code.","fix":"Upgrade openzeppelin-cairo-contracts to 0.6.1 or later.","what":"CVE-2023-23940 is a medium-severity vulnerability in OpenZeppelin cairo-contracts, published on 3 Feb 2023."},"fix_prompt":"Check this codebase for CVE-2023-23940 and fix it if it is affected.\n\nWhat it is: CVE-2023-23940 is a medium-severity vulnerability in OpenZeppelin cairo-contracts, published on 3 Feb 2023. \nExploitation: There is no known exploitation of CVE-2023-23940 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- openzeppelin-cairo-contracts (PyPI): affected from 0.2.0; fixed in 0.6.1\n- openzeppelin-cairo-contracts (PyPI): affected from 0.2.0; fixed in 0.6.1\n- openzeppelin-cairo-contracts (PyPI): affected from 0.2.0; fixed in 0.6.1\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-2023-23940/ (Markdown: https://insights.sbomify.com/CVE-2023-23940/index.md)","id":"CVE-2023-23940","markdown":"https://insights.sbomify.com/CVE-2023-23940/index.md","name":"CVE-2023-23940","record":{"aliases":["GHSA-626q-v9j4-mcp4","PYSEC-2023-39"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[{"product":"contracts","vendor":"openzeppelin"}],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"},{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"description":"OpenZeppelin Contracts for Cairo is a library for secure smart contract development written in Cairo for StarkNet, a decentralized ZK Rollup. `is_valid_eth_signature` is missing a call to `finalize_keccak` after calling `verify_eth_signature`. As a result, any contract using `is_valid_eth_signature` from the account library (such as the `EthAccount` preset) is vulnerable to a malicious sequencer. Specifically, the malicious sequencer would be able to bypass signature validation to impersonate an instance of these accounts. The issue has been patched in 0.6.1.","ecosystems":["PyPI"],"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 for Cairo is vulnerable to signature validation bypass","id":"CVE-2023-23940","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2023"},"n_packages":3,"n_references":2,"next":{"headline":"SwagPayPal payment not sent to PayPal correctly","id":"CVE-2023-23941"},"packages":[{"ecosystem":"PyPI","fixed":["0.6.1"],"introduced":["0.2.0"],"last_affected":[],"package":"openzeppelin-cairo-contracts","purl":null,"source":"GHSA-626q-v9j4-mcp4"},{"ecosystem":"PyPI","fixed":["0.6.1"],"introduced":["0.2.0"],"last_affected":[],"package":"openzeppelin-cairo-contracts","purl":"pkg:pypi/openzeppelin-cairo-contracts","source":"GHSA-626q-v9j4-mcp4"},{"ecosystem":"PyPI","fixed":["0.6.1"],"introduced":["0.2.0"],"last_affected":[],"package":"openzeppelin-cairo-contracts","purl":"pkg:pypi/openzeppelin-cairo-contracts","source":"PYSEC-2023-39"}],"prev":{"headline":"Azure/setup-kubectl: Escalation of privilege vulnerability for v3 and lower","id":"CVE-2023-23939"},"products":["cairo-contracts"],"published":"2023-02-03","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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"2025-03-10","vendors":["OpenZeppelin"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2023-23940/"}