Improper Handling of Missing Special Element |
Weakness ID: 166 (Weakness Base) | Status: Draft |
Description Summary
Reference | Description |
---|---|
CVE-2002-1362 | Crash via message type without separator character |
CVE-2002-0729 | Missing special character (separator) causes crash |
CVE-2002-1532 | HTTP GET without \r\n\r\n CRLF sequences causes product to wait indefinitely and prevents other users from accessing it |
Developers should anticipate that special elements will be removed in the input vectors of their software system. Use an appropriate combination of black lists and white lists to ensure only valid, expected and appropriate input is processed by the system. |
Phase: Architecture and Design Assume all input is malicious. Use a standard input validation mechanism to validate all input for length, type, syntax, and business rules before accepting the data to be displayed or stored. Use an "accept known good" validation strategy. |
Use and specify a strong output encoding (such as ISO 8859-1 or UTF 8). |
Do not rely exclusively on blacklist validation to detect malicious input or to encode output. There are too many variants to encode a character; you're likely to miss some variants. |
Inputs should be decoded and canonicalized to the application's current internal representation before being validated. Make sure that your application does not decode the same input twice. Such errors could be used to bypass whitelist schemes by introducing dangerous inputs after they have been checked. |
Nature | Type | ID | Name | View(s) this relationship pertains to![]() |
---|---|---|---|---|
ChildOf | ![]() | 159 | Failure to Sanitize Special Element | Development Concepts (primary)699 Research Concepts (primary)1000 |
ChildOf | ![]() | 703 | Failure to Handle Exceptional Conditions | Research Concepts1000 |
ChildOf | ![]() | 722 | OWASP Top Ten 2004 Category A1 - Unvalidated Input | Weaknesses in OWASP Top Ten (2004) (primary)711 |
Submissions | ||||
---|---|---|---|---|
Submission Date | Submitter | Organization | Source | |
PLOVER | Externally Mined | |||
Modifications | ||||
Modification Date | Modifier | Organization | Source | |
2008-07-01 | Eric Dalci | Cigital | External | |
updated Potential Mitigations, Time of Introduction | ||||
2008-09-08 | CWE Content Team | MITRE | Internal | |
updated Relationships, Other Notes, Taxonomy Mappings | ||||
2009-03-10 | CWE Content Team | MITRE | Internal | |
updated Relationships | ||||
2009-05-27 | CWE Content Team | MITRE | Internal | |
updated Description, Name | ||||
2009-07-27 | CWE Content Team | MITRE | Internal | |
updated Potential Mitigations | ||||
2009-10-29 | CWE Content Team | MITRE | Internal | |
updated Other Notes | ||||
Previous Entry Names | ||||
Change Date | Previous Entry Name | |||
2008-04-11 | Missing Special Element | |||
2009-05-27 | Failure to Handle Missing Special Element | |||