OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.
OpenSSH 7.7 a 7.9 y 8.x anterior de la versión 8.1, cuando se compila con un tipo de clave experimental, tiene un desbordamiento de entero de identificación previa si un cliente o servidor está configurado para usar una clave XMSS especialmente diseñada. Esto conduce a la corrupción de la memoria y la ejecución del código local debido a un error en el algoritmo de análisis de claves XMSS. NOTA: la implementación de XMSS se considera experimental en todas las versiones de OpenSSH lanzadas, y no hay una forma compatible para habilitarla al crear OpenSSH portátil.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
AV:L/AC:M/Au:N/C:P/I:P/A:P
| Access Vector | LOCAL |
|---|---|
| Access Complexity | MEDIUM |
| Authentication | NONE |
| Confidentiality Impact | PARTIAL |
| Integrity Impact | PARTIAL |
| Availability Impact | PARTIAL |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-190
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| openbsd | openssh | * | <built-in method update of dict object at 0x7fd369e80ec0> | Application |
| openbsd | openssh | * | <built-in method update of dict object at 0x7fd384122880> | Application |
| netapp | cloud_backup | - | <built-in method update of dict object at 0x7fd289fb93c0> | Application |
| netapp | steelstore_cloud_integrated_storage | - | <built-in method update of dict object at 0x7fd340a42a80> | Application |
| siemens | scalance_x204rna_firmware | * | <built-in method update of dict object at 0x7fd369e82f40> | Operating System |
| siemens | scalance_x204rna_ecc_firmware | * | <built-in method update of dict object at 0x7fd384120200> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* |
| Yes | cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| No | cpe:2.3:h:siemens:scalance_x204rna:-:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:siemens:scalance_x204rna_ecc_firmware:*:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| No | cpe:2.3:h:siemens:scalance_x204rna_ecc:-:*:*:*:*:*:*:* |