{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-32763",
        "STATE": "PUBLIC",
        "TITLE": "Regular Expression Denial of Service in OpenProject forum messages"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "openproject",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 11.3.3"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "opf"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "OpenProject is open-source, web-based project management software. In versions prior to 11.3.3, the `MessagesController` class of OpenProject has a `quote` method that implements the logic behind the Quote button in the discussion forums, and it uses a regex to strip `<pre>` tags from the message being quoted. The `(.|\\s)` part can match a space character in two ways, so an unterminated `<pre>` tag containing `n` spaces causes Ruby's regex engine to backtrack to try 2<sup>n</sup> states in the NFA. This will result in a Regular Expression Denial of Service. The issue is fixed in OpenProject 11.3.3. As a workaround, one may install the patch manually."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/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"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/opf/openproject/security/advisories/GHSA-qqvp-j6gm-q56f",
                "refsource": "CONFIRM",
                "url": "https://github.com/opf/openproject/security/advisories/GHSA-qqvp-j6gm-q56f"
            },
            {
                "name": "https://github.com/opf/openproject/pull/9447.patch",
                "refsource": "MISC",
                "url": "https://github.com/opf/openproject/pull/9447.patch"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-qqvp-j6gm-q56f",
        "discovery": "UNKNOWN"
    }
}