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Description
The software performs reverse DNS resolution on an IP address to obtain the hostname and make a security decision, but it does not properly ensure that the IP address is truly associated with the hostname.
Modes of Introduction:
– Architecture and Design
Related Weaknesses
CWE-290
CWE-923
CWE-807
CWE-923
Consequences
Access Control: Gain Privileges or Assume Identity, Bypass Protection Mechanism
Malicious users can fake authentication information by providing false DNS information.
Potential Mitigations
Phase: Architecture and Design
Description:
Use other means of identity verification that cannot be simply spoofed. Possibilities include a username/password or certificate.
Phase: Implementation
Description:
Perform proper forward and reverse DNS lookups to detect DNS spoofing.
CVE References
- CVE-2001-1488
- Does not do double-reverse lookup to prevent DNS spoofing.
- CVE-2000-1221
- Authentication bypass using spoofed reverse-resolved DNS hostnames.
- CVE-2002-0804
- Authentication bypass using spoofed reverse-resolved DNS hostnames.
- CVE-2001-1155
- Filter does not properly check the result of a reverse DNS lookup, which could allow remote attackers to bypass intended access restrictions via DNS spoofing.
- CVE-2004-0892
- Reverse DNS lookup used to spoof trusted content in intermediary.
- CVE-2003-0981
- Product records the reverse DNS name of a visitor in the logs, allowing spoofing and resultant XSS.
