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7.5
CVSSv3

CVE-2021-22696

CVSSv4: NA | CVSSv3: 7.5 | CVSSv2: 5 | VMScore: 850 | EPSS: 0.00334 | KEV: Not Included
Published: 02/04/2021 Updated: 21/11/2024

Vulnerability Summary

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 before 3.4.3; Apache CXF versions before 3.3.10.

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Vendor Advisories

Red Hat: Moderate: Red Hat JBoss Web Server 5.7.0 release and security update
Synopsis Moderate: Red Hat JBoss Web Server 570 release and security update Type/Severity Security Advisory: Moderate Topic Red Hat JBoss Web Server 570 zip release is now available for Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, and Microsoft WindowsRed Hat Product Security has rated this release as having a security impact ...
Red Hat: CVE-2021-22696
CXF supports (via JwtRequestCodeFilter) passing OAuth 2 parameters via a JWT token as opposed to query parameters (see: The OAuth 20 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 ...
Hitachi Security Advisories: Multiple Vulnerabilities in Hitachi Ops Center Common Services
Multiple vulnerabilities have been found in Hitachi Ops Center Common Services CVE-2020-1695, CVE-2020-1723, CVE-2020-1725, CVE-2020-10770, CVE-2020-14302, CVE-2020-15522, CVE-2020-25711, CVE-2020-27838, CVE-2020-28052, CVE-2020-28491, CVE-2021-3424, CVE-2021-3712, CVE-2021-20195, CVE-2021-20202, CVE-2021-20222, CVE-2021-20262, CVE-2021-21290, C ...

Mailing Lists

Full Disclosure: CVE-2021-22696: Apache CXF: OAuth 2 authorization service vulnerable to DDos attacks
Description: CXF supports (via JwtRequestCodeFilter) passing OAuth 2 parameters via a JWT token as opposed to query parameters (see: The OAuth 20 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 fro ...

References

CWE-400CWE-918CWE-918https://access.redhat.com/errata/RHSA-2022:7273https://nvd.nist.govhttps://www.first.org/epsshttp://www.openwall.com/lists/oss-security/2021/04/02/2https://cxf.apache.org/security-advisories.data/CVE-2021-22696.txt.aschttps://lists.apache.org/thread.html/r6445001cc5f9a2bb1e6316993753306e054bdd1d702656b7cbe59045%40%3Cannounce.apache.org%3Ehttps://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914%40%3Cdev.cxf.apache.org%3Ehttps://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914%40%3Cusers.cxf.apache.org%3Ehttps://lists.apache.org/thread.html/rec7160382badd3ef4ad017a22f64a266c7188b9ba71394f0d321e2d4%40%3Ccommits.cxf.apache.org%3Ehttps://lists.apache.org/thread.html/rfb87e0bf3995e7d560afeed750fac9329ff5f1ad49da365129b7f89e%40%3Ccommits.cxf.apache.org%3Ehttps://www.oracle.com/security-alerts/cpuapr2022.htmlhttps://www.oracle.com/security-alerts/cpuoct2021.htmlhttp://www.openwall.com/lists/oss-security/2021/04/02/2https://cxf.apache.org/security-advisories.data/CVE-2021-22696.txt.aschttps://lists.apache.org/thread.html/r6445001cc5f9a2bb1e6316993753306e054bdd1d702656b7cbe59045%40%3Cannounce.apache.org%3Ehttps://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914%40%3Cdev.cxf.apache.org%3Ehttps://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914%40%3Cusers.cxf.apache.org%3Ehttps://lists.apache.org/thread.html/rec7160382badd3ef4ad017a22f64a266c7188b9ba71394f0d321e2d4%40%3Ccommits.cxf.apache.org%3Ehttps://lists.apache.org/thread.html/rfb87e0bf3995e7d560afeed750fac9329ff5f1ad49da365129b7f89e%40%3Ccommits.cxf.apache.org%3Ehttps://www.oracle.com/security-alerts/cpuapr2022.htmlhttps://www.oracle.com/security-alerts/cpuoct2021.html
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