이름: Use of sizeof() on a Pointer Type

The code calls sizeof() on a pointer type, when the programmer intended to determine the size of the data that is being pointed to.

일반 정보

취약점 도입 방식

Implementation : The use of sizeof() on a pointer can sometimes generate useful information. An obvious case is to find out the wordsize on a platform. More often than not, the appearance of sizeof(pointer) indicates an incorrect calculation - i.e., a bug.

적용 가능한 플랫폼

언어

이름: C (Undetermined)
이름: C++ (Undetermined)

일반적인 결과

범위	영향	가능성
Integrity Confidentiality	Modify Memory, Read Memory 참고: This error can often cause one to allocate a buffer that is much smaller than what is needed, leading to resultant weaknesses such as buffer overflows.

관찰된 예시

참고 자료	설명
CVE-2025-33132	Database utility uses sizeof() on a pointer type, leading to incorrect size calculation and a crash.

잠재적 완화 방법

Phases : Implementation
Use expressions such as "sizeof(*pointer)" instead of "sizeof(pointer)", unless you intend to run sizeof() on a pointer type to gain some platform independence or if you are allocating a variable on the stack.

탐지 방법

Automated Static Analysis

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
효과성 : High

취약점 매핑 메모

근거 : This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
댓글 : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

참고 자료

REF-18

The CLASP Application Security Process
Secure Software, Inc..
https://cwe.mitre.org/documents/sources/TheCLASPApplicationSecurityProcess.pdf

REF-442

EXP01-A. Do not take the sizeof a pointer to determine the size of a type
Robert Seacord.
https://www.securecoding.cert.org/confluence/display/seccode/EXP01-A.+Do+not+take+the+sizeof+a+pointer+to+determine+the+size+of+a+type

제출

이름	조직	날짜	출시일	Version
CLASP		2006-07-19 +00:00	2006-07-19 +00:00	Draft 3

수정 사항

이름	조직	날짜	댓글
Eric Dalci	Cigital	2008-07-01 +00:00	updated Time_of_Introduction
	KDM Analytics	2008-08-01 +00:00	added/updated white box definitions
CWE Content Team	MITRE	2008-09-08 +00:00	updated Applicable_Platforms, Common_Consequences, Relationships, Other_Notes, Taxonomy_Mappings, Weakness_Ordinalities
CWE Content Team	MITRE	2008-11-24 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2009-03-10 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2009-12-28 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2010-02-16 +00:00	updated Relationships
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2011-06-27 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2011-09-13 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2012-05-11 +00:00	updated Relationships
CWE Content Team	MITRE	2014-06-23 +00:00	updated Description, Other_Notes
CWE Content Team	MITRE	2014-07-30 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2017-11-08 +00:00	updated Demonstrative_Examples, Taxonomy_Mappings, White_Box_Definitions
CWE Content Team	MITRE	2019-01-03 +00:00	updated Relationships
CWE Content Team	MITRE	2020-02-24 +00:00	updated References
CWE Content Team	MITRE	2023-04-27 +00:00	updated Detection_Factors, Relationships
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2024-11-19 +00:00	updated Description
CWE Content Team	MITRE	2025-04-03 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2026-10-28 +00:00	updated Description, Modes_of_Introduction, Observed_Examples

CWE-467 상세 정보

CWE-467