Authentication bypass via expired OAuth2 access tokens
Published Nov 10, 2024 · Updated Nov 19, 2024
Insufficient session expiration in LemonLDAP::NG 2.0.4 through 2.0.11 allows remote attackers to access OAuth2-protected resources. The OAuth2 handler accepts an OIDC client access token without rejecting it after the token has expired. Exploitation requires a previously issued access token and an enabled OAuth2 Handler, and it preserves access to resources protected by that handler beyond the token lifetime.
Summary
What happened
Insufficient session expiration in LemonLDAP::NG 2.0.4 through 2.0.11 allows remote attackers to access OAuth2-protected resources. The OAuth2 handler accepts an OIDC client access token without rejecting it after the token has expired. Exploitation requires a previously issued access token and an enabled OAuth2 Handler, and it preserves access to resources protected by that handler beyond the token lifetime.
The record
- CVE
- CVE-2021-35473
- Published
- Nov 10, 2024
- Updated
- Nov 19, 2024
- Vendor
- LemonLDAP::NG
- Product
- LemonLDAP::NG
- Classifications
- CWE-613
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 10, 2024CVE publishedPublication date reported by the CVE source.
- Nov 19, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <2.0.12
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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