{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-32738",
        "STATE": "PUBLIC",
        "TITLE": "Utils.readChallengeTx does not verify the server account signature"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "js-stellar-sdk",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 8.2.3"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "stellar"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "js-stellar-sdk is a Javascript library for communicating with a Stellar Horizon server. The `Utils.readChallengeTx` function used in SEP-10 Stellar Web Authentication states in its function documentation that it reads and validates the challenge transaction including verifying that the `serverAccountID` has signed the transaction. In js-stellar-sdk before version 8.2.3, the function does not verify that the server has signed the transaction. Applications that also used `Utils.verifyChallengeTxThreshold` or `Utils.verifyChallengeTxSigners` to verify the signatures including the server signature on the challenge transaction are unaffected as those functions verify the server signed the transaction. Applications calling `Utils.readChallengeTx` should update to version 8.2.3, the first version with a patch for this vulnerability, to ensure that the challenge transaction is completely valid and signed by the server creating the challenge transaction."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-287: Improper Authentication"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/stellar/js-stellar-sdk/security/advisories/GHSA-6cgh-hjpw-q3gq",
                "refsource": "CONFIRM",
                "url": "https://github.com/stellar/js-stellar-sdk/security/advisories/GHSA-6cgh-hjpw-q3gq"
            },
            {
                "name": "https://github.com/stellar/js-stellar-sdk/releases/tag/v8.2.3",
                "refsource": "MISC",
                "url": "https://github.com/stellar/js-stellar-sdk/releases/tag/v8.2.3"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-6cgh-hjpw-q3gq",
        "discovery": "UNKNOWN"
    }
}