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CVE-2021-22696— OAuth 2 authorization service vulnerable to DDos attacks

EPSS 1.97% · P84
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I. Basic Information for CVE-2021-22696

Vulnerability Information
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Vulnerability Title
OAuth 2 authorization service vulnerable to DDos attacks
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache CXF 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache CXF是美国阿帕奇（Apache）基金会的一个开源的Web服务框架。该框架支持多种Web服务标准、多种前端编程API等。 Apache CXF 存在代码问题漏洞，攻击者可利用该漏洞DDos攻击，以下产品及版本受到影响：Apache CXF versions prior to 3.4.3; Apache CXF versions prior to 3.3.10。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Apache Software FoundationApache CXF unspecified ~ 3.4.3 -

II. Public POCs for CVE-2021-22696

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III. Intelligence Information for CVE-2021-22696

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IV. Related Vulnerabilities

Same product: Apache CXF
Same vendor: Apache Software Foundation
Same weakness: CWE-918

V. Comments for CVE-2021-22696

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