FKIE_CVE-2023-27536
Vulnerability from fkie_nvd - Published: 2023-03-30 20:15 - Updated: 2026-10-23 23:10
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9 (Medium) - CVSS:3.1/
Summary
An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| haxx | libcurl | * | |
| fedoraproject | fedora | 36 | |
| debian | debian_linux | 10.0 | |
| netapp | active_iq_unified_manager | - | |
| netapp | h300s_firmware | - | |
| netapp | h300s | - | |
| netapp | h500s_firmware | - | |
| netapp | h500s | - | |
| netapp | h700s_firmware | - | |
| netapp | h700s | - | |
| netapp | h410s_firmware | - | |
| netapp | h410s | - | |
| netapp | ontap | 9 | |
| splunk | universal_forwarder | * | |
| splunk | universal_forwarder | * | |
| splunk | universal_forwarder | 9.1.0 |
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"lang": "en",
"value": "An authentication bypass vulnerability exists libcurl \u003c8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed."
},
{
"lang": "es",
"value": "Existe una vulnerabilidad de omisi\u00f3n de autenticaci\u00f3n en libcurl anterior a 8.0.0 en la caracter\u00edstica de reutilizaci\u00f3n de conexiones que puede reutilizar conexiones previamente establecidas con permisos de usuario incorrectos debido a un fallo al verificar cambios en la opci\u00f3n CURLOPT_GSSAPI_DELEGATION. Esta vulnerabilidad afecta a las transferencias krb5/kerberos/negotiate/GSSAPI y podr\u00eda potencialmente resultar en acceso no autorizado a informaci\u00f3n sensible. La opci\u00f3n m\u00e1s segura es no reutilizar conexiones si la opci\u00f3n CURLOPT_GSSAPI_DELEGATION ha sido cambiada."
}
],
"id": "CVE-2023-27536",
"lastModified": "2026-10-23T23:10:00.157",
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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