yiisoft/yii2-authclient's Oauth2 PKCE implementation is vulnerable

Impact What kind of vulnerability is it? Who is impacted? Original Report: The Oauth2 PKCE implementation is vulnerable in 2 ways: 1. The authCodeVerifier should be removed after usage similar to 'authState' 2. There is a risk for a "downgrade attack" if PKCE is being relied on for CSRF protectio...

Authentication Bypass

authentik is vulnerable to authentication bypass due to an insufficient PKCE check. The vulnerability is caused by codeverifier step during the OAUTH initialisation flow. Authentik improperly accepts the token request when codeverifier is omitted, even when the flow was started with a...

CVE-2023-48228

authentik is an open-source identity provider. When initialising a oauth2 flow with a codechallenge and codemethod thus requesting PKCE, the single sign-on provider authentik must check if there is a matching and existing codeverifier during the token step. Prior to versions 2023.10.4 and 2023.8....

CVE-2023-48228 OAuth2: PKCE can be fully circumvented

authentik is an open-source identity provider. When initialising a oauth2 flow with a codechallenge and codemethod thus requesting PKCE, the single sign-on provider authentik must check if there is a matching and existing codeverifier during the token step. Prior to versions 2023.10.4 and 2023.8....

CVE-2023-48228

CVE-2023-48228 affects the authentik open-source IDP. The vulnerability is in the PKCE code_verifier validation during OAuth2 token exchange: prior to versions 2023.10.4 and 2023.8.5, authentik accepted a token request without verifying the code_verifier even when a code_challenge was used. The i...

Dex vulnerable to Man-in-the-Middle allowing ID token capture via intercepted authorization code

Impact Dex instances with public clients and by extension, clients accepting tokens issued by those Dex instances are affected by this vulnerability. An attacker can exploit this vulnerability by making a victim navigate to a malicious website and guiding them through the OIDC flow, stealing the...

GHSA-VH7G-P26C-J2CW Dex vulnerable to Man-in-the-Middle allowing ID token capture via intercepted authorization code

Impact Dex instances with public clients and by extension, clients accepting tokens issued by those Dex instances are affected by this vulnerability. An attacker can exploit this vulnerability by making a victim navigate to a malicious website and guiding them through the OIDC flow, stealing the...

Shopify: Shop App - Attacker is able to intercept authorization code during authentication (OAuth) and is able to get access to Microsoft Outlook email account

A vulnerability was discovered in the Shop App's Microsoft Outlook OAuth flow, where a malicious app could intercept the authorization code during authentication due to the use of deep links. This could allow an attacker to gain access to the victim's emails. The issue was mitigated by implementi...

GHSA-2M7H-86QQ-FP4V Insecure entropy in Argo CD's PKCE/Oauth2/OIDC params

Impact All versions of Argo CD starting with v0.11.0 are vulnerable to a variety of attacks when an SSO login is initiated from the Argo CD CLI or UI. The vulnerabilities are due to the use of insufficiently random values in parameters in Oauth2/OIDC login flows. In each case, using a...

Insecure entropy in Argo CD's PKCE/Oauth2/OIDC params

Impact All versions of Argo CD starting with v0.11.0 are vulnerable to a variety of attacks when an SSO login is initiated from the Argo CD CLI or UI. The vulnerabilities are due to the use of insufficiently random values in parameters in Oauth2/OIDC login flows. In each case, using a...

Insecure entropy in Argo CD's PKCE/Oauth2/OIDC params

All versions of Argo CD starting with v0.11.0 is vulnerable to a variety of attacks when an SSO login is initiated from the Argo CD CLI or UI. The vulnerabilities are due to the use of insufficiently random values in parameters in Oauth2/OIDC login flows...

Insecure entropy in Argo CD's PKCE/Oauth2/OIDC params

Impact All versions of Argo CD starting with v0.11.0 is vulnerable to a variety of attacks when an SSO login is initiated from the Argo CD CLI or UI. The vulnerabilities are due to the use of insufficiently random values in parameters in Oauth2/OIDC login flows. In each case, using a...

Improper Authorization in Google OAuth Client

PKCE support is not implemented in accordance with the RFC for OAuth 2.0 for Native Apps. Without the use of PKCE, the authorization code returned by an authorization server is not enough to guarantee that the client that issued the initial authorization request is the one that will be authorized...

GHSA-F263-C949-W85G Improper Authorization in Google OAuth Client

PKCE support is not implemented in accordance with the RFC for OAuth 2.0 for Native Apps. Without the use of PKCE, the authorization code returned by an authorization server is not enough to guarantee that the client that issued the initial authorization request is the one that will be authorized...

Code Injection

Overview oauth2-server aka node-oauth2-server through 3.1.1 implements OAuth 2.0 without PKCE. It does not prevent authorization code injection. This is similar to CVE-2020-7692. NOTE: the vendor states 'As RFC7636 is an extension, I think the claim in the Readme of "RFC 6749 compliant" is valid...

Code Injection in oauth2-server

"oauth2-server aka node-oauth2-server through 3.1.1 implements OAuth 2.0 without PKCE. It does not prevent authorization code injection. This is similar to CVE-2020-7692. NOTE: the vendor states 'As RFC7636 is an extension, I think the claim in the Readme of "RFC 6749 compliant" is valid and not...

JFrog < 6.23.0 Multiple Vulnerabilities

According to its self-reported version number, the version of JFrog Artifactory installed on the remote host is prior to 6.23.0. It is, therefore, affected by multiple vulnerabilities: - The Alias feature in SnakeYAML 1.18 allows entity expansion during a load operation. CVE-2017-18640 - The file...

Security Bulletin: Google-api-client as used by IBM QRadar SIEM is vulnerable to authorization bypass (CVE-2020-7692)

Summary Google-api-client as used by IBM QRadar SIEM is vulnerable to authorization bypass, caused by no PKCE support implemented. Vulnerability Details CVEID: CVE-2020-7692 DESCRIPTION: Google APIs google-oauth-java-client could allow a remote attacker to bypass security restrictions, caused by ...

Security Bulletin: Upgrade javaenv:2.2 to address Gradle oauth authentication concerns.

Summary The version of Gradle shipped in the Fabric java chaincode environment image version 2.2. javaenv.2.2 depends on a vulnerable version of the google ouatth client. Vulnerability Details CVEID: CVE-2020-7692 DESCRIPTION: Google APIs google-oauth-java-client could allow a remote attacker to...

CVE-2017-18924

oauth2-server aka node-oauth2-server through 3.1.1 implements OAuth 2.0 without PKCE. It does not prevent authorization code injection. This is similar to CVE-2020-7692. NOTE: the vendor states 'As RFC7636 is an extension, I think the claim in the Readme of "RFC 6749 compliant" is valid and not...