Vendor dan Produk

CPE, singkatan dari Common Platform Enumeration, adalah skema standar untuk penamaan perangkat keras, perangkat lunak, dan sistem operasi. CPE menyediakan skema penamaan terstruktur untuk mengidentifikasi dan mengklasifikasikan sistem teknologi informasi, platform, dan paket secara unik berdasarkan atribut tertentu seperti vendor, nama produk, versi, pembaruan, edisi, dan bahasa.

Nama: Variable Extraction Error

The product uses external input to determine the names of variables into which information is extracted, without verifying that the names of the specified variables are valid.

Informasi Umum

Mode Pengenalan

Implementation

Platform yang Berlaku

Bahasa

Nama: PHP (Undetermined)
Kelas: Interpreted (Undetermined)

Konsekuensi Umum

Cakupan	Dampak	Kemungkinan
Integrity	Modify Application Data Catatan: An attacker could cause the program to overwrite unintended variables.
Integrity	Modify Application Data Catatan: When using PHP, calling extract() or import_request_variables() without the proper arguments could allow arbitrary global variables to be overwritten, including superglobals.

Contoh yang Diamati

Referensi	Deskripsi
CVE-2006-7135	extract issue enables file inclusion
CVE-2006-7079	Chain: PHP app uses extract for register_globals compatibility layer (CWE-621), enabling path traversal (CWE-22)
CVE-2007-0649	extract() buried in include files makes post-disclosure analysis confusing; original report had seemed incorrect.
CVE-2006-6661	extract() enables static code injection
CVE-2006-2828	import_request_variables() buried in include files makes post-disclosure analysis confusing

Mitigasi yang Memungkinkan

Phases : Implementation
Use allowlists of variable names that can be extracted.
Phases : Implementation
Consider refactoring your code to avoid extraction routines altogether.
Phases : Implementation
In PHP, call extract() with options such as EXTR_SKIP and EXTR_PREFIX_ALL; call import_request_variables() with a prefix argument. Note that these capabilities are not present in all PHP versions.

Catatan Pemetaan Kerentanan

Justifikasi : 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.
Komentar : 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.

Catatan

Probably under-reported for PHP. Seems under-studied for other interpreted languages.

Pengajuan

Nama	Organisasi	Tanggal	Tanggal rilis	Version
CWE Content Team	MITRE	2007-05-07 +00:00	2007-05-07 +00:00	Draft 6

Modifikasi

Nama	Organisasi	Tanggal	Komentar
Eric Dalci	Cigital	2008-07-01 +00:00	updated Time_of_Introduction
CWE Content Team	MITRE	2008-09-08 +00:00	updated Description, Relationships, Observed_Example, Other_Notes, Weakness_Ordinalities
CWE Content Team	MITRE	2008-10-14 +00:00	updated Description
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2012-05-11 +00:00	updated Common_Consequences, Demonstrative_Examples, Relationships
CWE Content Team	MITRE	2012-10-30 +00:00	updated Potential_Mitigations
CWE Content Team	MITRE	2013-02-21 +00:00	updated Demonstrative_Examples, 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	2020-02-24 +00:00	updated Relationships
CWE Content Team	MITRE	2020-06-25 +00:00	updated Potential_Mitigations
CWE Content Team	MITRE	2022-04-28 +00:00	updated Research_Gaps
CWE Content Team	MITRE	2023-04-27 +00:00	updated Relationships, Type
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2023-10-26 +00:00	updated Observed_Examples
CWE Content Team	MITRE	2026-04-30 +00:00	updated Potential_Mitigations
CWE Content Team	MITRE	2026-10-28 +00:00	updated Applicable_Platforms, Common_Consequences, Demonstrative_Examples, Description

Informasi yang disajikan di CVE Find berasal dari beberapa sumber referensi yang dipilih dengan cermat. Data CVE disediakan oleh MITRE Corporation dan National Vulnerability Database (NVD). Katalog Known Exploited Vulnerabilities (KEV) bersumber dari Cybersecurity and Infrastructure Security Agency (CISA), sementara skor EPSS berasal dari FIRST.org. Selain itu, data mengenai kelemahan perangkat lunak (CWE) dan pola serangan umum (CAPEC) dikelola oleh MITRE Corporation, dan informasi tentang konfigurasi perangkat keras dan perangkat lunak (CPE) disediakan oleh NVD.

Detail CWE-621

CWE-621