CVE-2021-22696

描述

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.

如何修補 CVE-2021-22696

要修補 CVE-2021-22696,請將受影響套件升級到下列已修補版本。

• —升級至 3.4.3 或更新版本
• —升級至 3.4.3 或更新版本

CVE-2021-22696 正在被利用嗎?

中等 — EPSS 為 6.6%,可持續追蹤但非最高優先。

受影響套件(2)

• >= 3.4.0, < 3.4.3
• >= 3.4.0, < 3.4.3

CVSS 分數

參考連結(13)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-22696
• PATCHgithub.com/apache/cxf
• WEBwww.openwall.com/lists/oss-security/2021/04/02/2
• WEBcxf.apache.org/security-advisories.data/CVE-2021-22696.txt.asc
• WEB