Sid 1-34952

Message

SERVER-OTHER OpenSSL invalid PSS parameter denial of service attempt

Summary

The ASN.1 signature-verification implementation in the rsaitemverify function in crypto/rsa/rsa_ameth.c in OpenSSL 1.0.2 before 1.0.2a allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted RSA PSS parameters to an endpoint that uses the certificate-verification feature.

Impact

CVSS base score 4.3 CVSS impact score 2.9 CVSS exploitability score 8.6 confidentialityImpact NONE integrityImpact NONE availabilityImpact NONE

CVE-2015-0208:

CVSS base score 4.3

CVSS impact score 2.9

CVSS exploitability score 8.6

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Detailed information

CVE-2015-0208: The ASN.1 signature-verification implementation in the rsaitemverify function in crypto/rsa/rsa_ameth.c in OpenSSL 1.0.2 before 1.0.2a allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted RSA PSS parameters to an endpoint that uses the certificate-verification feature.

Affected systems

• openssl openssl 1.0.2

Ease of attack

CVE-2015-0208:

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

False positives

None known

False negatives

None known

Corrective action

Upgrade to the latest non-affected version of the software.

Apply the appropriate vendor supplied patches.

Contributors

• Talos research team.
• This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology.
• For more information see nvd.

Additional References