CWE-297—Improper Validation of Certificate with Host Mismatch

名称

Improper Validation of Certificate with Host Mismatch

描述

The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host.

Even if a certificate is well-formed, signed, and follows the chain of trust, it may simply be a valid certificate for a different site than the site that the product is interacting with. In order to ensure data integrity, the certificate must be valid, and it must pertain to the site that is being accessed. Even if the product attempts to check the hostname, it is still possible to incorrectly check the hostname. For example, attackers could create a certificate with a name that begins with a trusted name followed by a NUL byte, which could cause some string-based comparisons to only examine the portion that contains the trusted name.

常见后果

范围：

Access Control

影响：

Gain Privileges or Assume Identity

注释：

The data read from the system vouched for by the certificate may not be from the expected system.

范围：

Authentication, Other

影响：

Other

注释：

Trust afforded to the system in question - based on the malicious certificate - may allow for spoofing or redirection attacks.

范围：

Access Control, Other

影响：

Gain Privileges or Assume Identity, Other

注释：

If the certificate's host-specific data is not properly checked - such as the Common Name (CN) in the Subject or the Subject Alternative Name (SAN) extension of an X.509 certificate - it may be possible for a redirection or spoofing attack to allow a malicious host with a valid certificate to provide data, impersonating a trusted host.

相关 CWE

• CWE-295Improper Certificate Validation
• CWE-923Improper Restriction of Communication Channel to Intended Endpoints