Staging Environment: Content and features may be unstable or change without notice.
Advisory details: gitlab / maven/org.apache.cxf/cxf-api/CVE-2021-22696
Advisory ID gitlab/maven/org.apache.cxf/cxf-api/CVE-2021-22696
Aliases CVE-2021-22696
Summary Uncontrolled Resource Consumption CXF supports (via `JwtRequestCodeFilter`) passing OAuth 2 parameters via a JWT token as opposed to query parameters (see: The OAuth 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 of the spec.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-918 Server-Side Request Forgery (SSRF)
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv2 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.cxf/cxf-api/CVE-2021-22696.yml
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.cxf/cxf-api/CVE-2021-22696.yml
Reference id Reference type URL
CVE-2021-22696 https://nvd.nist.gov/vuln/detail/CVE-2021-22696
CVE-2021-22696.TXT.ASC https://cxf.apache.org/security-advisories.data/CVE-2021-22696.txt.asc
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.cxf/cxf-api/CVE-2021-22696.yml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.cxf/cxf-api/CVE-2021-22696.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.