Add NULL check at the beginning of cJSON_SetNumberHelper to prevent
segmentation fault when called with NULL object pointer. The function
now returns NAN (Not-a-Number) when object is NULL, consistent with
error handling patterns in other cJSON functions.
This fixes a Denial of Service vulnerability (CWE-476) where an
attacker could crash applications using the cJSON library by
triggering this function with a NULL pointer.
Changes:
- cJSON.c: Add NULL check in cJSON_SetNumberHelper
- tests/misc_tests.c: Add test case and math.h include
Security: Fixes NULL pointer dereference vulnerability
The README stated that CMake 2.8.5+ was required, but CMakeLists.txt
requires CMake 3.5+. This inconsistency caused confusion for users
with CMake versions between 2.8.5 and 3.5.
Also updated library_config/uninstall.cmake to match for consistency.
Fixes#988
Lee