이름: Regular Expression without Anchors

The product uses a regular expression to perform neutralization, but the regular expression omits one or more anchors that may allow malicious or malformed data to slip through.

일반 정보

배경 세부 정보

취약점 도입 방식

Implementation

적용 가능한 플랫폼

언어

클래스: Not Language-Specific (Undetermined)
이름: Python (Undetermined)

기술

클래스: Not Technology-Specific (Undetermined)

일반적인 결과

범위	영향	가능성
Availability Confidentiality Access Control	Bypass Protection Mechanism, Varies by Context 참고: An unanchored regular expression in the context of an allowlist will possibly result in a protection mechanism failure. Malicious or malformed data may be included before or after any string matching the regular expression, allowing the data to enter trusted regions of the program. The type of malicious data that is allowed will depend on the context of the application and which anchors are omitted from the regular expression. The specific consequences will depend on what functionality the allowlist was protecting.

관찰된 예시

참고 자료	설명
CVE-2022-30034	Chain: Web UI for a Python RPC framework does not use regex anchors to validate user login emails (CWE-777), potentially allowing bypass of OAuth (CWE-1390).

잠재적 완화 방법

Phases : Implementation
Be sure to understand both what will be matched and what will not be matched by a regular expression. Anchoring the ends of the expression will allow the programmer to define an allowlist strictly limited to what is matched by the text in the regular expression. If you are using a package that only matches one line by default, ensure that you can match multi-line inputs if necessary.

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.

제출

이름	조직	날짜	출시일	Version
CWE Content Team	MITRE	2009-06-30 +00:00	2009-07-27 +00:00	1.5

수정 사항

이름	조직	날짜	댓글
CWE Content Team	MITRE	2010-06-21 +00:00	updated Description
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2017-11-08 +00:00	updated Likelihood_of_Exploit
CWE Content Team	MITRE	2020-02-24 +00:00	updated Relationships
CWE Content Team	MITRE	2020-06-25 +00:00	updated Common_Consequences, Description, Potential_Mitigations
CWE Content Team	MITRE	2022-10-13 +00:00	updated Demonstrative_Examples, Observed_Examples
CWE Content Team	MITRE	2023-01-31 +00:00	updated Description
CWE Content Team	MITRE	2023-04-27 +00:00	updated Relationships
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2025-12-11 +00:00	updated Applicable_Platforms, Weakness_Ordinalities
CWE Content Team	MITRE	2026-10-28 +00:00	updated Applicable_Platforms, Background_Details, Common_Consequences, Description

CWE-777 상세 정보

CWE-777