Description:
Critical Buffer Overflow in the user registration and password authentication module. The system fails to validate input length, leading to memory corruption and a total system freeze (DoS)
Steps to Reproduce:
Start the OS and enter the setup wizard.
In the Username field, enter a string significantly exceeding the 31-character limit (e.g., 100+ characters). Observe UI displacement.
Proceed through Timezone and Theme fields using invalid data/overflow strings.
In the Password field, enter the hexadecimal null character equivalent 0x00
In the Confirm Password field, fill the buffer with spaces until the character limit is reached and input stops.
Type 0 as the final character.
Expected Behavior:
The system should truncate input at the specified limit, validate the data types (e.g., numeric for timezone), and gracefully handle mismatched or overlong passwords without affecting system stability.
Actual Behavior:
UI Corruption: Long strings bypass window boundaries and overwrite arbitrary areas of the video memory.
System Halt: Upon entering the final '0' in the confirmation field, the OS hangs indefinitely. No keyboard interrupts or screen updates occur, indicating a catastrophic failure of the instruction pointer or corruption of the Interrupt Vector Table (IVT).
Logic Bypass & Late-Stage Crash: The system allows proceeding through the setup even when passwords do not match (likely due to buffer overflow overwriting the comparison target).
Total system failure occurs at the "Segment initialization" stage.
Type mismatch (letters in numeric fields like Timezone) is not handled, potentially corrupting configuration pointers in memory.
Environment:
Description:
Critical Buffer Overflow in the user registration and password authentication module. The system fails to validate input length, leading to memory corruption and a total system freeze (DoS)
Steps to Reproduce:
Start the OS and enter the setup wizard.
In the Username field, enter a string significantly exceeding the 31-character limit (e.g., 100+ characters). Observe UI displacement.
Proceed through Timezone and Theme fields using invalid data/overflow strings.
In the Password field, enter the hexadecimal null character equivalent 0x00
In the Confirm Password field, fill the buffer with spaces until the character limit is reached and input stops.
Type 0 as the final character.
Expected Behavior:
The system should truncate input at the specified limit, validate the data types (e.g., numeric for timezone), and gracefully handle mismatched or overlong passwords without affecting system stability.
Actual Behavior:
UI Corruption: Long strings bypass window boundaries and overwrite arbitrary areas of the video memory.
System Halt: Upon entering the final '0' in the confirmation field, the OS hangs indefinitely. No keyboard interrupts or screen updates occur, indicating a catastrophic failure of the instruction pointer or corruption of the Interrupt Vector Table (IVT).
Logic Bypass & Late-Stage Crash: The system allows proceeding through the setup even when passwords do not match (likely due to buffer overflow overwriting the comparison target).
Total system failure occurs at the "Segment initialization" stage.
Type mismatch (letters in numeric fields like Timezone) is not handled, potentially corrupting configuration pointers in memory.
Environment: