Process-Global Authentication Bypass in HAProxy Data Plane API
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
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| HAProxy | Data Plane API EE | unaffected |
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| HAProxy | Data Plane API CE | unaffected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||||||||||||||||||
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| Haproxy | Data Plane Api Ce |
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| Haproxy | Data Plane Api Ee |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.355% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Haproxy
Haproxy data Plane Api Ce Haproxy data Plane Api Ee |
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| Vendors & Products |
Haproxy
Haproxy data Plane Api Ce Haproxy data Plane Api Ee |
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| Title | Process-Global Authentication Bypass in HAProxy Data Plane API |
| Type | Values Removed | Values Added |
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| Description | In HAProxy Data Plane API 2.2.0 through 3.4.3 (and corresponding Enterprise Edition releases), Server.ConfigureAPI() has process-global authentication logic that improperly drops security controls across multiple transport types. When a TLS Certificate Authority (tls_ca) is configured and a numeric TLS port (tls_port) is specified, the application globally disables Basic authentication on its shared internal request handler. Because this handler is shared concurrently among HTTP, HTTPS, and UNIX domain socket listeners, and mutual TLS (mTLS) client certificate verification (tls.RequireAndVerifyClientCert) is enforced exclusively on the HTTPS server path, all other simultaneously active non-mTLS listeners fail open. Consequently, an unauthenticated attacker capable of reaching an affected HTTP or UNIX management endpoint can completely bypass credentials to gain full API administrative access. This allows unauthorized remote or local actors to read sensitive, cleartext HAProxy configuration data or replace the managed configuration entirely via the raw configuration endpoint. This has been fixed in versions 3.4.4, 3.3.9, 3.2.17, 3.0.25, 2.9.29, and their respective EE backports by migrating to a per-request TLS connection-state validation model. | |
| Weaknesses | CWE-306 | |
| References |
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| Metrics |
cvssV3_1
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