Think you have a false positive on this rule?

Sid 1-34889

Message

SERVER-OTHER OpenSSL denial-of-service via crafted x.509 certificate attempt

Summary

The ASN1TYPEcmp function in crypto/asn1/a_type.c in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a does not properly perform boolean-type comparisons, which allows remote attackers to cause a denial of service (invalid read operation and application crash) via a crafted X.509 certificate to an endpoint that uses the certificate-verification feature.

Impact

CVSS base score 5.0 CVSS impact score 2.9 CVSS exploitability score 10.0 confidentialityImpact NONE integrityImpact NONE availabilityImpact NONE

CVE-2015-0286:

CVSS base score 5.0

CVSS impact score 2.9

CVSS exploitability score 10.0

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Detailed information

CVE-2015-0286: The ASN1TYPEcmp function in crypto/asn1/a_type.c in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a does not properly perform boolean-type comparisons, which allows remote attackers to cause a denial of service (invalid read operation and application crash) via a crafted X.509 certificate to an endpoint that uses the certificate-verification feature.

Affected systems

  • openssl openssl 0.9.8ze
  • openssl openssl 1.0.0
  • openssl openssl 1.0.0a
  • openssl openssl 1.0.0b
  • openssl openssl 1.0.0c
  • openssl openssl 1.0.0d
  • openssl openssl 1.0.0e
  • openssl openssl 1.0.0f
  • openssl openssl 1.0.0g
  • openssl openssl 1.0.0h
  • openssl openssl 1.0.0i
  • openssl openssl 1.0.0j
  • openssl openssl 1.0.0k
  • openssl openssl 1.0.0l
  • openssl openssl 1.0.0m
  • openssl openssl 1.0.0n
  • openssl openssl 1.0.0o
  • openssl openssl 1.0.0p
  • openssl openssl 1.0.0q
  • openssl openssl 1.0.1
  • openssl openssl 1.0.1a
  • openssl openssl 1.0.1b
  • openssl openssl 1.0.1c
  • openssl openssl 1.0.1d
  • openssl openssl 1.0.1e
  • openssl openssl 1.0.1f
  • openssl openssl 1.0.1g
  • openssl openssl 1.0.1h
  • openssl openssl 1.0.1i
  • openssl openssl 1.0.1j
  • openssl openssl 1.0.1k
  • openssl openssl 1.0.1l
  • openssl openssl 1.0.2

Ease of attack

CVE-2015-0286:

Access Vector NETWORK

Access Complexity LOW

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