fkie_cve-2021-22890
Vulnerability from fkie_nvd
Published
2021-04-01 18:15
Modified
2024-11-21 05:50
Severity ?
Summary
curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| haxx | libcurl | * | |
| fedoraproject | fedora | 32 | |
| fedoraproject | fedora | 33 | |
| fedoraproject | fedora | 34 | |
| netapp | hci_management_node | - | |
| netapp | solidfire | - | |
| netapp | hci_storage_node | - | |
| broadcom | fabric_operating_system | - | |
| debian | debian_linux | 9.0 | |
| siemens | sinec_infrastructure_network_services | * | |
| oracle | communications_billing_and_revenue_management | 12.0.0.3.0 | |
| oracle | essbase | 21.2 | |
| splunk | universal_forwarder | * | |
| splunk | universal_forwarder | * | |
| splunk | universal_forwarder | 9.1.0 |
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"value": "curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly \"short-cut\" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check."
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"value": "curl versiones 7.63.0 hasta 7.75.0 incluy\u00e9ndola, incluye una vulnerabilidad que permite que un proxy HTTPS malicioso acceda a una conexi\u00f3n MITM debido al manejo inapropiado de los tickets de sesi\u00f3n de TLS versi\u00f3n 1.3.\u0026#xa0;Cuando se usa un proxy HTTPS y TLS 1.3, libcurl puede confundir los tickets de sesi\u00f3n que llegan del proxy HTTPS pero funciona como si llegaran del servidor remoto y luego \"short-cut\" incorrectamente el protocolo de enlace del host.\u0026#xa0;Al confundir los tickets, un proxy HTTPS puede enga\u00f1ar a libcurl para que utilice la reanudaci\u00f3n del ticket de sesi\u00f3n incorrecta para el host y, por lo tanto, omitir la verificaci\u00f3n del certificado TLS del servidor y hacer que un ataque MITM sea posible de realizar sin ser detectado.\u0026#xa0;Tome en cuenta que dicho proxy HTTPS malicioso debe proporcionar un certificado que curl aceptar\u00e1 para el servidor MITMed para que funcione un ataque, a menos que se le haya dicho a curl que ignore la verificaci\u00f3n del certificado del servidor."
}
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"id": "CVE-2021-22890",
"lastModified": "2024-11-21T05:50:51.007",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.