BF Specification of CVE-2004-1287 Stack Buffer Overflow in NASM 0.98.38 1.2
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Missing verification of 'arg' towards a upper limit leads to use of an inconsistent size for an object, allowing a pointer reposition over its bounds, which, when used in ‘vsprintf()' leads to a stack buffer overflow. If exploited, this can lead to data tampering, denial of service (application crash), or remote code execution.
//generated// Missing Code (in ‘vsprintf(buff, fmt, arg)’) to Verify upper bound via Quantity Entered in Codebase (preproc.c#L4070) Local leads to Inconsistent Value (‘arg’) , which propagates to Wrong Size (‘arg’) Sequential Reposition (pointer) Stack Used Codebase (preproc.c#L4070) in Userland that results in Overbound Pointer (‘buff’) , which propagates to Overbound Pointer (‘buff’) Sequential Write (object) Stack Used Codebase (preproc.c#L4070) in Userland that results in Buffer Overflow (‘buff’) , which can be exploited toward Arbitrary Code Execution (ACE) (everything could be lost) or Denial of Service (DOS) (availability loss) or Data Tampering (TPR) (integrity loss) security failure.
preproc.c#L4070
preproc.c#L4070
preproc.c#L4070
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| Class | Definition |
| Operation | Definition |
| Cause/Consequence | Definition |
| Code Bug | Code Bug type – An error in the implementation of an operation – proper operands over an improper operation. It is the roor cause of a security vulnerability. Must be fixed to resolve the vulnerability. |
| Missing Code | Missing Code bug - The operation is misplaced entirely absent. |
| Data Error/Fault | Data error (or fault) type – The data of an object has harmed semantics or inconsistent or wrong value. |
| Inconsistent Value | Inconsistent Value error (or fault) – The data value does not correspond to related data value (e.g., inconstancy between the value of a size variable and the actual buffer size). |
| Wrong Size | Wrong Size error (or fault) – The value used as size or length (i.e., the number of elements) does not match the object's memory size or length (e.g., to limit a pointer reposition or index increment/decrement in a repetition statement). |
| Address Error/Fault | Address error (or fault) type – The address of an object is wrong. |
| Overbound Pointer | Overbound Pointer error (or fault) – Holds an address that is above the upper boundary of its object. |
| Memory Corruption/Disclosure Final Error | Memory Corruption/Disclosure final error/exploit vector type – An exploitable or undefined system behavior caused by memory addressing, allocation, use, or deallocation bugs. |
| Buffer Overflow | Buffer Overflow final error – Write data above the upper bound of an object (i.e., buffer over-write). |
| Operation Attribute | Definition |
| Mechanism | Mechanism operation attribute type – Shows how the operation with a bug or faulty operand is performed. |
| Quantity | Quantity operation attribute – The operation checks data for a specific measurable value (e.g., size, time, rate, frequency). |
| Sequential | Sequential operation attribute – The operation is via iterating over the object elements. |
| Source Code | Source Code operation attribute type – Shows where the code of the operation with a bug or faulty operand resides within the software, firmware, or hardware. |
| Codebase | Codebase operation attribute – The operation is in the programmer's code - in the application itself. |
| Execution Space | Execution Space operation attribute type – Shows where the operation with a bug or faulty operand is executed and the privilege level at which it runs. |
| Local | Local operation attribute – The bugged code runs in an environment with access control policy with limited (local user) permission. |
| Userland | Userland operation attribute – The bugged code runs in an environment with privilege levels, but in unprivileged mode (e.g., ring 3 in x86 architecture). |
| Operand Attribute | Definition |
| Data State | Data State operand attribute type – Shows where the data comes from. |
| Entered | Entered operand attribute – Data are from a user via a user interface (e.g., input field, dialog or a command prompt). |
| Address State | Address State operand attribute type – Shows where the address is (i.e., its location) in the memory layout. |
| Stack | The object is a non-static local variable (defined in a function, a passed parameter, or a function return address). |
| Size Kind | Size Kind operand attribute type – Shows what is used as the size or length (i.e., the number of elements) of an object - e.g., as the limit for traversal over the elements. |
| Used | Used operand attribute – A supplied value to be used as the size or length (i.e., the number of elements) of an object. |