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Sid 1-35111

Message

SERVER-OTHER OpenSSL anomalous x509 certificate with default org name and certificate chain detected

Summary

The X509verifycert function in crypto/x509/x509_vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly process X.509 Basic Constraints cA values during identification of alternative certificate chains, which allows remote attackers to spoof a Certification Authority role and trigger unintended certificate verifications via a valid leaf certificate.

Impact

CVSS base score 6.5 CVSS impact score 2.5 CVSS exploitability score 3.9 confidentialityImpact LOW integrityImpact LOW availabilityImpact LOW

CVE-2015-1793:

CVSS base score 6.5

CVSS impact score 2.5

CVSS exploitability score 3.9

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Detailed information

CVE-2015-1793: The X509verifycert function in crypto/x509/x509_vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly process X.509 Basic Constraints cA values during identification of alternative certificate chains, which allows remote attackers to spoof a Certification Authority role and trigger unintended certificate verifications via a valid leaf certificate.

Affected systems

  • openssl openssl 1.0.1n
  • openssl openssl 1.0.1o
  • openssl openssl 1.0.2b
  • openssl openssl 1.0.2c
  • oracle jdedwardsenterpriseone_tools 9.1
  • oracle jdedwardsenterpriseone_tools 9.2
  • oracle supplychainproducts_suite 6.1.2.2
  • oracle supplychainproducts_suite 6.1.3.0
  • oracle supplychainproducts_suite 6.2.0
  • oracle opus10gethernetswitchfamily 2.0.0.6

Ease of attack

CVE-2015-1793:

Access Vector

Access Complexity

Authentication

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