Failure to Sanitize Section Delimiters |
Weakness ID: 145 (Weakness Variant) | Status: Incomplete |
Description Summary
Extended Description
As data is parsed, an injected/absent/malformed delimiter may cause the process to take unexpected actions that result in an attack. One example of a section delimiter is the boundary string in a multipart MIME message. In many cases, doubled line delimiters can serve as a section delimiter.
Developers should anticipate that section delimiters 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 | Weakness Base | 140 | Failure to Sanitize Delimiters | Development Concepts (primary)699 Research Concepts (primary)1000 |
CanAlsoBe | Weakness Base | 93 | Failure to Sanitize CRLF Sequences ('CRLF Injection') | Research Concepts1000 |
Depending on the language and syntax being used, this could be the same as the record delimiter (CWE-143). |
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, Relationship Notes, Taxonomy Mappings | ||||
2008-10-14 | CWE Content Team | MITRE | Internal | |
updated Description | ||||
2009-07-27 | CWE Content Team | MITRE | Internal | |
updated Potential Mitigations | ||||
Previous Entry Names | ||||
Change Date | Previous Entry Name | |||
2008-04-11 | Section Delimiter | |||