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Weakness (CWE)

CWE-682: Incorrect Calculation

Pillar Draft Mapping discouraged

The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.

How to prevent it (6 mitigations)

  1. Implementation

    Understand your programming language's underlying representation and how it interacts with numeric calculation. Pay close attention to byte size discrepancies, precision, signed/unsigned distinctions, truncation, conversion and casting between types, "not-a-number" calculations, and how your language handles numbers that are too large or too small for its underlying representation.

  2. Implementation

    Perform input validation on any numeric input by ensuring that it is within the expected range. Enforce that the input meets both the minimum and maximum requirements for the expected range.

  3. Implementation

    Use the appropriate type for the desired action. For example, in C/C++, only use unsigned types for values that could never be negative, such as height, width, or other numbers related to quantity.

  4. Architecture and Design

    Use languages, libraries, or frameworks that make it easier to handle numbers without unexpected consequences.

    Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++).

  5. Architecture and Design

    Use languages, libraries, or frameworks that make it easier to handle numbers without unexpected consequences.

    Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++).

  6. Implementation

    Examine compiler warnings closely and eliminate problems with potential security implications, such as signed / unsigned mismatch in memory operations, or use of uninitialized variables. Even if the weakness is rarely exploitable, a single failure may lead to the compromise of the entire system.

Source: MITRE CWE-682

All Critical High Medium Low Exploited only Public exploit

2 results · Clear filters · Feed

  • Critical 10.0
    CVE-2023-2163 Public exploit

    Incorrect Verifier Branch Pruning Logic Leads To Arbitrary Read/Write In Linux Kernel and Lateral Privilege Escalation

    Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe code paths being incorrectly marked as safe, resulting in arbitrary read/write in kernel memory, lateral privilege escalation, and container escape.

    Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2022-30600 Public exploit

    Incorrect Calculation in moodle

    A flaw was found in moodle where logic used to count failed login attempts could result in the account lockout threshold being bypassed.

    moodle/moodle moodle Web / CMS Ubuntu Packagist