CVE-2023-23940: Openzeppelin cairo contracts OpenZeppelin Contracts Contains Improper Verification Vulnerability
MODERATECVE-2023-23940 is a MODERATE (CVSS 5.3) openzeppelin contracts contains improper verification vulnerability (CWE-345: Insufficient Verification of Data Authenticity) affecting Openzeppelin cairo contracts libraries in the PyPI ecosystem. The issue involves openzeppelin contracts contains improper verification of cryptographic signature. Remediation is available by upgrading affected packages to version 0.6.1.
CVE-2023-23940 at a Glance
Security Impact
CVSS: 5.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2023-23940
To remediate this vulnerability, upgrade all affected Openzeppelin cairo contracts dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
pip install openzeppelin-cairo-contracts>=0.6.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
pip show openzeppelin-cairo-contractsHow to Check if You Are Affected
To determine whether your Python environment is affected by CVE-2023-23940, inspect your installed packages using pip:
pip show openzeppelin-cairo-contractsAnalyze the terminal output to locate any version of Openzeppelin cairo contracts in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.6.1), your application is affected.
Note: The pip show openzeppelin-cairo-contracts command checks currently installed packages in your active Python environment.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-345: Insufficient Verification of Data Authenticity, where the product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. In Openzeppelin cairo contracts, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2023-23940 Affected Openzeppelin cairo contracts Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
openzeppelin-cairo-contracts
|
PyPI |
≥ 0.2.0
< 0.6.1
|
0.6.1
|
References
Frequently Asked Questions
What is CVE-2023-23940?
Which Openzeppelin cairo contracts versions are affected?
What version fixes CVE-2023-23940?
Is openzeppelin-cairo-contracts affected?
What is the CVSS score of CVE-2023-23940?
What CWE is associated with CVE-2023-23940?
How can I check PyPI dependencies for CVE-2023-23940?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-626q-v9j4-mcp4",
"modified" : "2024-10-07T21:19:33Z",
"published" : "2023-02-02T16:59:46Z",
"aliases" : [ "CVE-2023-23940" ],
"summary" : "OpenZeppelin Contracts contains Improper Verification of Cryptographic Signature",
"details" : "### Cause\n`is_valid_eth_signature` is missing a call to `finalize_keccak` after calling `verify_eth_signature`. \n\n### Impact\nAs 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.\n\n### Risk\nIn order to exploit this vulnerability, it is required to control a sequencer or prover since they're the ones executing the hints, being able to inject incorrect keccak results.\n\nToday StarkWare is the only party running both a prover or a sequencer, greatly reducing the risk of exploit.\n\n### Patches\nThe issue has been patched in 0.6.1.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the Contracts for Cairo repository](https://github.com/OpenZeppelin/cairo-contracts/issues/new/choose)\n* Email us at [security@openzeppelin.com](mailto:security@openzeppelin.com)",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "PyPI",
"name" : "openzeppelin-cairo-contracts"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0.2.0"
}, {
"fixed" : "0.6.1"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/OpenZeppelin/cairo-contracts/security/advisories/GHSA-626q-v9j4-mcp4"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-23940"
}, {
"type" : "WEB",
"url" : "https://github.com/OpenZeppelin/cairo-contracts/pull/542/commits/6d4cb750478fca2fd916f73297632f899aca9299"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/OpenZeppelin/cairo-contracts"
}, {
"type" : "WEB",
"url" : "https://github.com/pypa/advisory-database/tree/main/vulns/openzeppelin-cairo-contracts/PYSEC-2023-39.yaml"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-345", "CWE-347" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2023-02-02T16:59:46Z",
"nvd_published_at" : "2023-02-03T20:15:00Z"
}
}