cvelist/2021/43xxx/CVE-2021-43843.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-43843",
        "STATE": "PUBLIC",
        "TITLE": "Insufficient patch for Regular Expression Denial of Service (ReDoS) to jsx-slack v4.5.1"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "jsx-slack",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 4.5.2"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "yhatt"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "jsx-slack is a package for building JSON objects for Slack block kit surfaces from JSX. The maintainers found the patch for CVE-2021-43838 in jsx-slack v4.5.1 is insufficient tfor protection from a Regular Expression Denial of Service (ReDoS) attack. If an attacker can put a lot of JSX elements into `<blockquote>` tag _with including multibyte characters_, an internal regular expression for escaping characters may consume an excessive amount of computing resources. v4.5.1 passes the test against ASCII characters but misses the case of multibyte characters. jsx-slack v4.5.2 has updated regular expressions for escaping blockquote characters to prevent catastrophic backtracking. It is also including an updated test case to confirm rendering multiple tags in `<blockquote>` with multibyte characters."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400: Uncontrolled Resource Consumption"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-1333: Inefficient Regular Expression Complexity"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/yhatt/jsx-slack/security/advisories/GHSA-hp68-xhvj-x6j6",
                "refsource": "CONFIRM",
                "url": "https://github.com/yhatt/jsx-slack/security/advisories/GHSA-hp68-xhvj-x6j6"
            },
            {
                "name": "https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q",
                "refsource": "MISC",
                "url": "https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q"
            },
            {
                "name": "https://github.com/yhatt/jsx-slack/commit/46bc88391d89d5fda4ce689e18ca080bcdd29ecc",
                "refsource": "MISC",
                "url": "https://github.com/yhatt/jsx-slack/commit/46bc88391d89d5fda4ce689e18ca080bcdd29ecc"
            },
            {
                "name": "https://github.com/yhatt/jsx-slack/releases/tag/v4.5.2",
                "refsource": "MISC",
                "url": "https://github.com/yhatt/jsx-slack/releases/tag/v4.5.2"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-hp68-xhvj-x6j6",
        "discovery": "UNKNOWN"
    }
}