Missing Expiration Check in OAuth2.0 Handler Confirms Access Token Validity Vulnerability
CVE-2021-35473

9.1CRITICAL

Key Information:

Vendor

LemonLDAP::NG

Vendor
CVE Published:
10 November 2024

What is CVE-2021-35473?

A security vulnerability in LemonLDAP::NG affects the OAuth2.0 handler, specifically due to a missing expiration check. This oversight permits attackers to exploit expired access tokens from OpenID Connect (OIDC) clients, gaining unauthorized access to the OAuth2 handler. The vulnerability is present in all versions before 2.0.12, highlighting the need for updates to secure access token validation.

References

https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/tags
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues...

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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