Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CWE-463 (对数据结构哨兵域的删除) — Vulnerability Class 1

1 vulnerabilities classified as CWE-463 (对数据结构哨兵域的删除). AI Chinese analysis included.

CWE-463 represents a critical logic error where developers accidentally remove essential markers, or sentinels, that define the boundaries of data structures. These sentinels, such as null terminators in strings or specific pointers in linked lists, signal the end of a sequence to processing algorithms. When deleted, the system loses its ability to correctly identify data limits, leading to severe programming logic failures. Attackers typically exploit this weakness by manipulating input to trigger out-of-bounds reads or writes, potentially causing buffer overflows, denial of service, or arbitrary code execution. To prevent this, developers must rigorously validate all data manipulation operations, ensuring that boundary markers are preserved during insertion, modification, or deletion tasks. Implementing strict bounds checking and using safe, high-level string handling libraries further mitigates the risk of inadvertently stripping these vital structural indicators.

MITRE CWE Description
The accidental deletion of a data-structure sentinel can cause serious programming logic problems. Often times data-structure sentinels are used to mark structure of the data structure. A common example of this is the null character at the end of strings. Another common example is linked lists which may contain a sentinel to mark the end of the list. It is dangerous to allow this type of control data to be easily accessible. Therefore, it is important to protect from the deletion or modification outside of some wrapper interface which provides safety.
Common Consequences (2)
Availability, OtherOther
Generally this error will cause the data structure to not work properly.
Authorization, OtherOther
If a control character, such as NULL is removed, one may cause resource access control problems.
Mitigations (3)
Architecture and DesignUse an abstraction library to abstract away risky APIs. Not a complete solution.
Build and CompilationRun or compile the software using features or extensions that automatically provide a protection mechanism that mitigates or eliminates buffer overflows. For example, certain compilers and extensions provide automatic buffer overflow detection mechanisms that are built into the compiled code. Examples include the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard,…
Effectiveness: Defense in Depth
OperationUse OS-level preventative functionality. Not a complete solution.
Examples (1)
This example creates a null terminated string and prints it contents.
char *foo; int counter; foo=calloc(sizeof(char)*10); for (counter=0;counter!=10;counter++) { foo[counter]='a'; printf("%s\n",foo); }
Bad · C
CVE IDTitleCVSSSeverityPublished
CVE-2024-13318 Essential WP Real Estate <= 1.1.3 - Missing Authorization to Arbitrary Post/Page Deletion — Essential WP Real Estate 5.3 Medium2025-01-10

Vulnerabilities classified as CWE-463 (对数据结构哨兵域的删除) represent 1 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.