BF Specification of CVE-2019-14814 Heap Overflow in Marvell wifi diver in Linux kernel up to excluding v5.3

Missing verification of 'rate_ie->len' 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 'memcpy()' leads to a heap buffer overflow. If exploited, this can lead to denial of service – system crash; and possibly arbitrary code execution.

vendor:product: linux:linux_kernel:*

Bug Report

Code with Bug

Code with Fix

NVD Entry

DVRData Verification (DVR) class – Data are verified (semantics check) or corrected (assign, remove) improperly.
MADMemory Addressing (MAD) class – The pointer to an object is initialized, repositioned, or reassigned to an improper memory address.
MUSMemory Use (MUS) class – An object is initialized, read, written, or cleared improperly.
VerifyVerify operation – Check data semantics (e.g., proper value/meaning) in order to accept (and possibly correct) or reject it.
RepositionReposition operation – Change the pointer to another position inside its object.
WriteWrite operation – Change the data value of an object to another meaningful value.
Code BugCode Bug type – Defect in the implementation of the operation – proper operands over an improper operation. A first cause for the chain of weaknesses underlying a software security vulnerability. Must be fixed to resolve the vulnerability.
   Missing CodeMissing Code bug - The operation is entirely absent.
Data Error/FaultData Fault/Error type – The object data has harmed semantics or inconsistent or wrong value.
   Inconsistent ValueInconsistent Value fault/error – 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 SizeWrong Size fault/error – The value used as size does not match the actual size of the object (e.g., to restrict pointer reposition or index increment/decrement in a repetition statement).
Address Error/FaultAddress Fault/Error type – The object address in use is wrong.
   Over Bounds PointerOver Bounds Pointer fault/error – Holds an address above the upper boundary of its object.
Memory Corruption/Disclosure Final ErrorMemory Corruption/Disclosure exploitable error type – An exploitable or undefined system behavior caused by memory addressing, allocation, use, and deallocation bugs.
   Buffer OverflowBuffer Overflow exploitable error – Write data above the upper bound of an object (i.e., buffer overwrite).
Operation AttributeDefinition
MechanismMechanism operation attribute type – Shows how the operation code is performed.
   RangeRange operation attribute – The operation checks data are within a (min, max) interval.
   SequentialSequential operation attribute – The operation is via iterating over the object elements.
Source CodeSource Code operation attribute type – Shows where the operation code is in software or firmware.
   CodebaseCodebase operation attribute – The operation is in the programmer's code - in the application itself.
   Third-PartyThird-Party operation attribute – The operation code is in a third-party software.
Execution SpaceExecution Space operation attribute type – Shows where the operation code is running or with what privilege level.
   AdminAdmin operation attribute – The bugged code runs in an environment with access control policy with unlimited (admin user) permission.
   KernelKernel operation attribute – The bugged code runs in an environment with privilege levels with access privileged instructions (e.g., ring 0 in x86 architecture).
   UserlandUserland operation attribute – The bugged code runs in an environment with privilege levels, but in unprivileged mode (e.g., ring 3 in x86 architecture).
Operand AttributeDefinition
Data StateData State operand attribute type operand attribute – Shows where the data come from.
   In UseIn Use operand attribute – Data are from a volatile storage (e.g., RAM, cache memory).
Address StateAddress State operand attribute type - Shows where the address is in the memory layout.
   HeapHeap operand attribute – The object is a dynamically allocated data structure (e.g., via malloc() and new).
Size KindSize Kind operand attribute type – Shows the object's limit for traversal.
   UsedUsed operand attribute – A supplied size for an object.
Address KindAddress Kind operand attribute type - Shows how much memory is accessed outside object's bounds.
   HugeHuge operand attribute - More than 1 KB of memory.