Improper Sanitization of Multiple Internal Special Elements |
Weakness ID: 165 (Weakness Variant) | Status: Incomplete |
Description Summary
Extended Description
As data is parsed, improperly handled multiple internal special elements may cause the process to take unexpected actions that result in an attack.
Developers should anticipate that multiple internal special elements will be injected/removed/manipulated 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 | ![]() | 164 | Improper Sanitization of Internal Special Elements | Development Concepts (primary)699 Research Concepts (primary)1000 |
ParentOf | ![]() | 45 | Path Equivalence: 'file...name' (Multiple Internal Dot) | Research Concepts1000 |
ParentOf | ![]() | 53 | Path Equivalence: '\multiple\\internal\backslash' | Research Concepts1000 |
Mapped Taxonomy Name | Node ID | Fit | Mapped Node Name |
---|---|---|---|
PLOVER | Multiple Internal Special Element |
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, Taxonomy Mappings | ||||
2008-10-14 | CWE Content Team | MITRE | Internal | |
updated Description | ||||
2009-05-27 | CWE Content Team | MITRE | Internal | |
updated Description, Name, Relationships | ||||
2009-07-27 | CWE Content Team | MITRE | Internal | |
updated Potential Mitigations | ||||
Previous Entry Names | ||||
Change Date | Previous Entry Name | |||
2008-04-11 | Multiple Internal Special Elements | |||
2009-05-27 | Failure to Sanitize Multiple Internal Special Elements | |||