{
    "CVE_data_meta": {
        "ASSIGNER": "security@apache.org",
        "ID": "CVE-2021-22696",
        "STATE": "PUBLIC",
        "TITLE": "OAuth 2 authorization service vulnerable to DDos attacks"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Apache CXF",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_value": "3.4.3"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_value": "3.3.10"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Apache Software Foundation"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "CXF supports (via JwtRequestCodeFilter) passing OAuth 2 parameters via a JWT token as opposed to query parameters (see: The OAuth 2.0 Authorization Framework: JWT Secured Authorization Request (JAR)). Instead of sending a JWT token as a \"request\" parameter, the spec also supports specifying a URI from which to retrieve a JWT token from via the \"request_uri\" parameter. CXF was not validating the \"request_uri\" parameter (apart from ensuring it uses \"https) and was making a REST request to the parameter in the request to retrieve a token. This means that CXF was vulnerable to DDos attacks on the authorization server, as specified in section 10.4.1 of the spec. This issue affects Apache CXF versions prior to 3.4.3; Apache CXF versions prior to 3.3.10."
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.9"
    },
    "impact": {},
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-918 Server-Side Request Forgery (SSRF)"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400 Uncontrolled Resource Consumption"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "url": "https://cxf.apache.org/security-advisories.data/CVE-2021-22696.txt.asc",
                "name": "https://cxf.apache.org/security-advisories.data/CVE-2021-22696.txt.asc"
            },
            {
                "refsource": "MLIST",
                "name": "[cxf-dev] 20210402 CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attacks",
                "url": "https://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914@%3Cdev.cxf.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20210402 CVE-2021-22696: Apache CXF: OAuth 2 authorization service vulnerable to DDos attacks",
                "url": "http://www.openwall.com/lists/oss-security/2021/04/02/2"
            },
            {
                "refsource": "MLIST",
                "name": "[cxf-users] 20210402 CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attacks",
                "url": "https://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914@%3Cusers.cxf.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[cxf-commits] 20210402 svn commit: r1073270 - in /websites/production/cxf/content: cache/main.pageCache security-advisories.data/CVE-2021-22696.txt.asc security-advisories.html",
                "url": "https://lists.apache.org/thread.html/rec7160382badd3ef4ad017a22f64a266c7188b9ba71394f0d321e2d4@%3Ccommits.cxf.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[announce] 20210402 [Apache CXF] CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attacks",
                "url": "https://lists.apache.org/thread.html/r6445001cc5f9a2bb1e6316993753306e054bdd1d702656b7cbe59045@%3Cannounce.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[cxf-commits] 20210616 svn commit: r1075801 - in /websites/production/cxf/content: cache/main.pageCache index.html security-advisories.data/CVE-2021-30468.txt.asc security-advisories.html",
                "url": "https://lists.apache.org/thread.html/rfb87e0bf3995e7d560afeed750fac9329ff5f1ad49da365129b7f89e@%3Ccommits.cxf.apache.org%3E"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpuoct2021.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpuoct2021.html"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpuapr2022.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpuapr2022.html"
            }
        ]
    },
    "source": {
        "discovery": "UNKNOWN"
    }
}