IM
IronMonkey Threat Research

CVE-2019-1563 MEDIUM

Published: 2019-09-10 | Last Modified: 2026-06-17 | Status: Modified

Description

In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

Additional Descriptions (1)

En situaciones donde un atacante recibe una notificación automática del éxito o el fracaso de un intento de descifrado, un atacante, luego de enviar una gran número de mensajes para descifrar, puede recuperar una clave de cifrado transportada de CMS/PKCS7 o descifrar cualquier mensaje cifrado de RSA que se cifró con la clave pública de RSA, utilizando un ataque de tipo padding oracle de Bleichenbacher. Las aplicaciones no están afectadas si usan un certificado junto con la clave RSA privada para las funciones CMS_decrypt o PKCS7_decrypt para seleccionar la información correcta del destinatario a descifrar. Corregido en OpenSSL versión 1.1.1d (afectada la versión 1.1.1-1.1.1c). Corregido en OpenSSL versión 1.1.0l (afectada la versión 1.1.0-1.1.0k). Corregido en OpenSSL versión 1.0.2t (afectada la versión 1.0.2-1.0.2s).

CVSS Metrics

Base Score: 3.7 (LOW)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactLOW
Integrity ImpactNONE
Availability ImpactNONE

Source: [email protected]

Type: Primary

Exploitability Score: 2.2

Impact Score: 1.4

Base Score: 4.3 (MEDIUM)

AV:N/AC:M/Au:N/C:P/I:N/A:N

Access VectorNETWORK
Access ComplexityMEDIUM
AuthenticationNONE
Confidentiality ImpactPARTIAL
Integrity ImpactNONE
Availability ImpactNONE

Source: [email protected]

Type: Primary

Exploitability Score: 8.6

Impact Score: 2.9

Weaknesses

Source Type Description
[email protected] Primary
en CWE-203
en CWE-327

Affected Products

Vendor Product Version Update Type
openssl openssl * <built-in method update of dict object at 0x72a9b092adc0> Application
openssl openssl * <built-in method update of dict object at 0x72a9ccf8ad00> Application
openssl openssl * <built-in method update of dict object at 0x72a9b0dce500> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*

References

Notification
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