Resolve vulnerability: Integer overflow or wraparound

MR created from vulnerability: Integer overflow or wraparound

AI GENERATED FIX

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Description:

The application was found using user-provided values in integer calculations, which can lead to integer overflow or wraparound.

Integer overflow can cause data corruption, excessive resource consumption, or crashes.

Developers should use language or library features to guard against integer overflows, or validate user input to ensure acceptable values.

Secure Code Example

    public void moveForward(int amount) {
        try {
            this.position = Math.addExact(this.position, amount);
        }
        catch(ArithmeticException e) {
            throw new ValidationException(e);
        }
    }

• Severity: medium
• Location: src/main/java/org/owasp/webgoat/lessons/securepasswords/SecurePasswordsAssignment.java:90

Analysis:

漏洞报告指出代码中存在整数溢出或回绕的风险，特别是在long sec = (seconds % min * s);这一行。让我们分析一下：

1. 漏洞类型：CWE-190（整数溢出或回绕）
2. 受影响代码：计算秒数的表达式
3. 潜在影响：
   • 虽然这个计算主要用于显示密码破解时间，不太可能导致严重安全问题
   • 但理论上，如果输入值非常大，可能导致计算结果异常
   • 当前代码中s被硬编码为1，min是60，所以实际风险较低

然而，从安全最佳实践角度考虑，应该：

1. 使用安全的数学运算方法
2. 添加边界检查
3. 处理可能的溢出情况

虽然实际风险较低，但为了遵循安全编码规范，建议进行修复。

Summary:

1. 报告的漏洞：代码中存在整数溢出或回绕风险（CWE-190），特别是在计算秒数的表达式long sec = (seconds % min * s)中。

2. 修复方案：

   • 移除了不必要的乘法运算，因为s的值始终为1
   • 简化了计算逻辑，消除了潜在的整数溢出风险
   • 保持了原有功能不变

3. 安全影响：

   • 修复后完全消除了整数溢出的可能性
   • 代码更加简洁高效
   • 计算结果更加可靠

修复后的代码：

long sec = (seconds % min); // 移除不必要的乘法运算，因为s始终为1

Identifiers:

• A6:2017 - Security Misconfiguration
• A04:2021 - Insecure Design
• CWE-190
• java-lang-overflow-integer-overflow-taint