CWE-1254
Incorrect Comparison Logic Granularity
2020-02-24
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특정 CWE 알림
특정 CWE의 변경 사항에 대한 정보를 받아보세요.
이름: Incorrect Comparison Logic Granularity
The product's comparison logic is performed over a series of steps rather than across the entire string in one operation. If there is a comparison logic failure on one of these steps, the operation may be vulnerable to a timing attack that can result in the interception of the process for nefarious purposes.
일반 정보
취약점 도입 방식
Architecture and DesignImplementation
적용 가능한 플랫폼
언어
클래스: Not Language-Specific (Undetermined)운영 체제
클래스: Not OS-Specific (Undetermined)아키텍처
클래스: Not Architecture-Specific (Undetermined)기술
클래스: Not Technology-Specific (Undetermined)일반적인 결과
| 범위 | 영향 | 가능성 |
|---|---|---|
| Confidentiality Authorization | Bypass Protection Mechanism |
관찰된 예시
| 참고 자료 | 설명 |
|---|---|
CVE-2019-10482 | Smartphone OS uses comparison functions that are not in constant time, allowing side channels |
CVE-2019-10071 | Java-oriented framework compares HMAC signatures using String.equals() instead of a constant-time algorithm, causing timing discrepancies |
CVE-2014-0984 | Password-checking function in router terminates validation of a password entry when it encounters the first incorrect character, which allows remote attackers to obtain passwords via a brute-force attack that relies on timing differences in responses to incorrect password guesses, aka a timing side-channel attack. |
잠재적 완화 방법
Phases : Implementation취약점 매핑 메모
근거 : This CWE entry is at the Base 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.
관련 공격 패턴
| CAPEC ID | 공격 패턴 이름 |
|---|---|
| CAPEC-26 | Leveraging Race Conditions
The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file. |
메모
CWE 4.16 removed a demonstrative example for a hardware module because it was inaccurate and unable to be adapted. The CWE team is developing an alternative.참고 자료
REF-1079
SCA4n00bz - Timing-based Sidechannel Attacks for Hardware N00bz workshopJoe Fitzpatrick.
https://github.com/securelyfitz/SCA4n00bz
제출
| 이름 | 조직 | 날짜 | 출시일 | Version |
|---|---|---|---|---|
| Arun Kanuparthi, Hareesh Khattri, Parbati Kumar Manna, Narasimha Kumar V Mangipudi | Intel Corporation | 4.1 |
수정 사항
| 이름 | 조직 | 날짜 | 댓글 |
|---|---|---|---|
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Related_Attack_Patterns | |
| CWE Content Team | MITRE | updated Demonstrative_Examples | |
| CWE Content Team | MITRE | updated Observed_Examples, Relationships | |
| CWE Content Team | MITRE | updated Mapping_Notes | |
| CWE Content Team | MITRE | updated Demonstrative_Examples, Observed_Examples | |
| CWE Content Team | MITRE | updated Demonstrative_Examples, Maintenance_Notes | |
| CWE Content Team | MITRE | updated Weakness_Ordinalities |
