Description
The software does not properly protect an assumed-immutable element from being modified by an attacker.
This occurs when a particular input is critical enough to the functioning of the application that it should not be modifiable at all, but it is. Certain resources are often assumed to be immutable when they are not, such as hidden form fields in web applications, cookies, and reverse DNS lookups.
Modes of Introduction:
– Implementation
Related Weaknesses
Consequences
Integrity: Modify Application Data
Common data types that are attacked are environment variables, web application parameters, and HTTP headers.
Integrity: Unexpected State
Potential Mitigations
Phase: Architecture and Design, Operation, Implementation
Description:
When the data is stored or transmitted through untrusted sources that could modify the data, implement integrity checks to detect unauthorized modification, or store/transmit the data in a trusted location that is free from external influence.
CVE References
- CVE-2002-1757
- Relies on $PHP_SELF variable for authentication.
- CVE-2005-1905
- Gain privileges by modifying assumed-immutable code addresses that are accessed by a driver.