[Precogs AI] Auto-Fix: 20 vulnerabilities in 8 files#23
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Precogs Auto-Fix — 20 Vulnerabilities Fixed
Vulnerability Details
cpp-programming/Lab_21/city_temperature_control.cppExplanation:
Primary: Insecure Binary Serialization / Insecure Deserialization (CWE-502) — The code uses raw binary serialization by writing and reading the in-memory representation of a CityTemperature object (which contains std::string and virtual functions) directly to/from disk using out.write((char*)&obj, sizeof(obj)) and in.read((char*)&obj, sizeof(obj)). C++ objects that contain non-POD members (std::string) and/or virtual tables are not safely portable as raw bytes. Reading raw bytes back into such objects corrupts internal pointers (std::string internal pointer, vptr for virtual dispatch), leading to undefined behavior, memory corruption, crashes, and potentially control-flow hijacking if an attacker can craft or replace the file. An attacker who can control or replace the 'Temperature' file can supply specially crafted bytes that will be memcpy'd into the object fields (including the vtable pointer and internal string pointers), causing arbitrary code execution or denial of service when methods are invoked.
Also found: Uncontrolled Recursion (calling main() from menu) (CWE-674) — In the menu, selecting '0' causes the program to call main() from within CityTemperatureInfo(), resulting in recursion. Repeated selection can lead to unbounded recursion and eventual stack overflow, causing denial-of-service (crash). This is unsafe program control flow and poor lifecycle management. Instead of invoking main() recursively, the function should return control to its caller or use an explicit loop-driven program flow.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_21/city_temperature_control.cppExplanation:
Primary: Unsafe Deserialization / Insecure Binary I/O (CWE-502) — The function reads and writes raw object bytes to files using writes/reads like outR.write((char*)&R, sizeof(...)) and ifstream.read((char*)&R,...). This is unsafe deserialization: the program treats file contents as trusted binary object images without any validation, versioning, bounds checking or integrity checks. An attacker who can place or modify files in the application's working directory (or trick the program into opening a crafted file) can craft binary contents that, when deserialized, lead to undefined behavior, memory corruption, or maliciously-set fields used later by the program. There is no format/version checking, no size validation, and object layout differences across builds/compilers/platforms make this brittle and exploitable.
Also found: Race condition / Insecure use of predictable temporary files (TOCTOU) (CWE-367) — The function writes updates to a predictable temp filename "RTemp" and then removes and renames without atomic guarantees or permission checks. An attacker (local user or other process) can create a symlink or race the temp file to cause rename/remove to affect an unintended file, causing data loss or file overwrite. Additionally, the logic mistakenly uses the wrong stream variable (inR1) in a loop after opening inR, which results in incorrect behavior and can cause records to be lost or an empty temp file to be used for rename — amplifying the risk of data loss.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_21/city_temperature_control.cppExplanation:
The main and other functions call system() with commands such as "cls" and "pause". While these particular calls use literal strings, invoking the system shell is a risky practice: environment variables or PATH manipulation or platform differences can lead to unexpected program execution. Additionally, relying on system() reduces portability and can expose the application to command injection if any future changes introduce concatenation with user input. Minimizing use of system() and using explicit APIs or simple C++ I/O for waits and screen management is safer.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_21/e-commerce.cppExplanation:
Item is a polymorphic base class (it defines virtual methods). It is possible that objects of derived types (PackedGroceries, FreshGroceries) may be handled through Item* pointers. Because Item lacks a virtual destructor, deleting a derived object through a base pointer leads to undefined behavior: the derived destructor will not be invoked, causing resource leaks and potential corruption. Although this code does not show explicit delete operations, the class hierarchy is polymorphic and missing a virtual destructor is a design flaw that can lead to security and stability problems when object lifetimes are managed polymorphically.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_21/e-commerce.cppExplanation:
Primary: Unsafe binary serialization / deserialization of C++ objects containing std::string (CWE-502) — The application serializes C++ objects by writing their raw memory representation to disk with out.write((char*)&p, sizeof(PackedGroceries)) and deserializes by reading bytes back into object memory with in.read((char*)&p, sizeof(...)). PackedGroceries and FreshGroceries contain std::string members and virtual methods; those types are non-POD, have internal pointers/heap-managed memory, and their in-memory layout is implementation-defined. Reading attacker-supplied bytes into such objects can corrupt the std::string internals, lead to use-after-free, crashes, or arbitrary code execution when the objects are used or destructed. This is classic unsafe deserialization of untrusted data.
Also found: Uncontrolled recursion / stack growth by calling main() from Purchase() (CWE-400) — The code invokes main() from within Purchase() to return to the main menu. This creates nested invocations of main() (and Purchase() when reentered), growing the call stack each time the user chooses this option. An attacker or unintentional repeated usage can exhaust the process stack, causing a crash (Denial of Service). Proper control flow should return from the function to let the caller decide how to continue instead of invoking main() recursively.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_21/e-commerce.cppExplanation:
The code serializes and deserializes C++ objects by directly writing and reading their raw memory representation to/from disk using reinterpretation to char* and sizeof(object). This is unsafe because the on-disk bytes are untrusted input: reading raw memory can overwrite internal object state, vtable pointers, or pointer members, violating object invariants and enabling memory corruption, crashes, or even arbitrary code execution when the deserialized objects are used (e.g., p.display()). There is no validation of file existence, file size, record counts, or integrity checks (no signatures, checksums, or schema validation). An attacker who can replace or craft the 'Packed' or 'Fresh' files can provide specially crafted bytes to manipulate object memory on deserialization.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_19/main.cppExplanation:
The function F_First_Program opens and writes/reads several files but never checks whether the file streams successfully opened or whether I/O operations succeeded. Additionally, the loop 'while (in_one && in_two)' uses the previous values of num1 and num2 before the first successful reads, producing wrong results and potentially using uninitialized or stale data. Failing to check return values or stream states can lead to incorrect behavior, crashes, or being misled by attacker-controlled files (e.g., replaced with symbolic links or truncated), which may enable data corruption or information disclosure.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_19/main.cppExplanation:
F_Third_Program uses main() to return to the main menu (recursive control flow). This creates nested calls to main(), potentially leading to stack exhaustion and denial of service. Additionally, the code reads from the numbers file using 'while (in_numbers)' and then extraction inside the loop; this pattern does not check the success of the extraction (in_numbers >> numbers) and may loop one extra time or use stale/uninitialized data. Both issues affect program correctness and availability.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_19/main.cppExplanation:
The main function (and other functions) call system() with commands such as "cls" and "pause". Invoking system() introduces reliance on the OS command processor and can be risky: if the environment is compromised or PATH altered, these calls could execute unexpected binaries. While the literal strings here are constant, best practice is to avoid system() and use safer, platform-appropriate alternatives (or explicit library methods) for clearing or pausing. Excessive use of system() also increases attack surface and can create behavioral differences across environments.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Project_Bank_Management_System/main.cppExplanation:
The code seeds the C library PRNG with the current epoch second (time(0)) and then uses rand() to derive ::available. Seeding with the current time is predictable (low entropy) and rand() is not cryptographically secure. If ::available is used as any security token, account identifier, or seed for other security decisions, an attacker who can estimate roughly when the program started can predict the generated value. This is a predictable randomness vulnerability (CWE-330).
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Project_Bank_Management_System/main.cppExplanation:
Primary: Buffer Overflow (Out-of-bounds array access) (CWE-119) — The function allocates a fixed-size local array oldData[50] but then processes entries up to ::increaments and passes the array to outData(oldData). If ::increaments > 50 or if outData writes more than 50 items, accesses (oldData[i]) and writes will go out of bounds, causing heap/stack corruption. This can be exploited to crash the program or to achieve arbitrary code execution depending on memory layout. No bounds checking or dynamic allocation is performed based on the actual number of stored accounts.
Also found: Cleartext Storage of Sensitive Information (Plaintext Passwords) (CWE-312) — Passwords are collected from the user and stored/compared as plaintext. Storing passwords in cleartext (or comparing plaintext passwords directly) risks disclosure if persistent storage (files, database) is read by an attacker, an insider, or an attacker who exploits another vulnerability. There is no hashing, salting, or use of secure password storage mechanisms. This is CWE-312.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_10/studentCourseEvaluation.cppExplanation:
TakeData() reads user-provided values directly with operator>> into numeric fields (OOP2_Score, math_Score, english_Score) and string fields (student_name) without validation. Non-numeric input will set the stream into a failed state, potentially leaving variables unchanged or uninitialized. Names that contain spaces are truncated when using operator>>. Lack of input validation allows malformed input to propagate into business logic (ctotal) resulting in incorrect totals, undefined behavior, or downstream logic errors.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_10/studentCourseEvaluation.cppExplanation:
total_salary() multiplies Hours and Rate as 32-bit ints and stores the result in an int. If Hours and/or Rate are large (or negative) values, the multiplication can overflow the int range, producing incorrect (possibly negative) results or undefined behavior. The inputs are set from user input without validation (setHours/setRate), so an attacker can provide values that cause overflow.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_10/studentCourseEvaluation.cppExplanation:
The program uses system() calls to invoke shell commands ("cls", "pause"). While the arguments are constant strings, calling out to the system shell can be dangerous because the environment (e.g., COMSPEC on Windows, PATH) can be influenced and cause unexpected/attacker-controlled programs to run. Use of system() is considered unsafe for applications that may run in untrusted environments. Additionally, the functions provide no error reporting or sanitization.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_17/Education.cppExplanation:
Teacher::getdata uses operator>> to read 'subject' and 'publications'. operator>> will truncate multi-word subjects at whitespace; publications is read as an int without checking stream state or validating ranges (e.g., negative numbers). Non-numeric input for publications will set cin.fail() and may leave 'publications' unchanged, causing unexpected behavior downstream.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_17/Education.cppExplanation:
F_First_Program_Menu uses system("cls") and system("pause") in multiple places to clear the screen and pause. Relying on system() calls invokes a shell or platform command interpreter and can be risky: if the environment or working directory is manipulated, an attacker might cause unintended programs to run. It is better to replace these with safe, controlled console operations or portable approaches (such as printing newlines, using console API, or reading from cin).
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_16/Source.cppExplanation:
Teacher::getdata() reads publications with operator>> into an int. If the user enters non-numeric input, the stream will fail, publications will not be assigned, and further input operations may be broken. There is no validation or recovery, enabling malformed input to cause inconsistent program state.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_16/Source.cppExplanation:
Master::update() calls system("cls") inside a loop to clear the screen. While in this code the command is a fixed string, use of system() is considered unsafe because if future modifications concatenate untrusted input into the command string, it would allow OS command injection. Additionally, system() is costly, has portability issues, and can cause unexpected side effects. Replacing it with a safe console-clear implementation (or API calls) avoids the risk.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_16/Source.cppExplanation:
The function repeatedly calls the C library system() function with shell commands such as "cls" and "pause". Even though the current calls use string literals, calls to system() invoke the OS command interpreter and are considered unsafe: they increase attack surface (e.g., depending on environment, PATH, or future maintenance that replaces the literal with runtime input). Use of system() can lead to OS command injection vulnerabilities or accidental execution of unexpected binaries if the environment is maliciously modified. Best practice is to avoid system() entirely and use platform APIs (here, the Win32 console APIs) or direct, bounded I/O for equivalent functionality.
Please review and address the issue accordingly.
Vulnerability Details
cpp-programming/Lab_18/main.cppExplanation:
In F_Second(), selecting the '0' (Back) option executes a direct call to main(), which creates a new top-level invocation of main() while the previous call chain remains on the stack. Repeating this (navigating between menus and selecting Back repeatedly) nests main() invocations until the stack is exhausted and the program crashes. There is no limit or unwinding of recursion.
Please review and address the issue accordingly.
This PR was auto-generated by Precogs AI. Review the changes and verify CI results before merging.