BF Specification of CVE-2017-17833
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Missing reposition of the 'result' pointer leads to a dangling pointer due to reallocation of the same object via 'sendbuf', which, when used to resize (second reallocation) the object leads to a double free. If exploited, this can lead to a denial of service or an arbitrary (remote) code execution.
| vendor:product: openslp:openslp:1.0.2 | Bug Report | Code with Bug | Code with Fix | NVD Entry |
| Class | Definition |
| MAD | The pointer to an object is initialized, repositioned, or reassigned to an improper memory address. |
| MMN | An object is allocated, deallocated, or resized improperly. |
| Operation | Definition |
| Reposition | Change the pointer to another position inside its object. |
| Reallocate-Extend | Reserve a new larger piece of memory for an object at a new address, copy the object content there, reassign its pointer, and deallocate the previous piece of memory. |
| Cause/Consequence | Definition |
| Code Defect Bug | The operation has a bug, which is the first cause for the chain of weaknesses underlying a software security vulnerability. The bug must be fixed to resolve the vulnerability. |
| Missing Code | The entire operation implementation or a part of its specification is absent. |
| Address Error/Fault | The object address in use is wrong. |
| Dangling Pointer | Still points to the address of its successfully deallocated object. |
| Memory Corruption/Disclosure Final Error | An exploitable or undefined system behavior caused by memory addressing, allocation, use, and deallocation bugs. |
| Double Free | An attempt to deallocate a deallocated object or via an uninitialized pointer. |
| Operation Attribute | Definition |
| Mechanism | Shows how the buggy/faulty operation code is performed. |
| Sequential | The operation is performed after iterating over the object elements. |
| Explicit | The operation is performed by a function/method call. |
| Source Code | Shows where the buggy/faulty operation code is in the program -- in what kind of software. |
| Third-Party | The operation is in a third-party software. |
| Execution Space | Shows where the buggy/faulty operation code is running or with what privilege level). |
| Userland | The bugged code runs in an environment with privilege levels, but in unprivileged mode (e.g., ring 3 in x86 architecture). |
| Operand Attribute | Definition |
| Address State | Shows where the address is in the memory layout. |
| Heap | The object is a dynamically allocated data structure (e.g., via malloc() and new). |
| Size Kind | Shows what the limit for traversal of the object is. |
| Used | A supplied size for an object. |