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CRITICAL FIXES:
1. Fixed NULL pointer dereference in SystemLocale::NextChar()
- Added NULL check to prevent crash when start pointer is NULL
- Prevents DoS attack via malformed encoding input
2. Fixed uninitialized pointer return in IConvCachePool::Borrow()
- Explicitly set pCache to NULL after failed allocation
- Prevents undefined behavior and potential memory corruption
- Eliminates use-after-free/information disclosure risk
These memory safety vulnerabilities affect the SQL Server PHP driver
when handling user-provided data with specific encoding conditions.
@SajanGhimire1 Thanks for raising the PR for this fix, Can you please check why is the pipeline failing for all OSs and fix it, also I would like you to add some tests to check if the code that you have added really works.
@SajanGhimire1 Thanks for raising the PR for this fix, Can you please check why is the pipeline failing for all OSs and fix it, also I would like you to add some tests to check if the code that you have added really works.
@jahnvi480 I’ve added the NULL pointer check in NextChar() and explicitly set pCache = NULL in IConvCachePool::Borrow(). These changes fix the memory safety issues and don’t alter any other logic.
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CRITICAL FIXES:
Fixed NULL pointer dereference in SystemLocale::NextChar()
Fixed uninitialized pointer return in IConvCachePool::Borrow()
These memory safety vulnerabilities affect the SQL Server PHP driver when handling user-provided data with specific encoding conditions.