이름: Covert Timing Channel
Covert timing channels convey information by modulating some aspect of system behavior over time, so that the program receiving the information can observe system behavior and infer protected information.
일반 정보
취약점 도입 방식
Architecture and DesignImplementation
적용 가능한 플랫폼
언어
클래스: Not Language-Specific (Undetermined)일반적인 결과
| 범위 | 영향 | 가능성 |
|---|---|---|
| Confidentiality Other | Read Application Data, Other 참고: In some instances, knowing when data is transmitted between parties can provide a malicious user with privileged information. Also, externally monitoring the timing of operations can potentially reveal sensitive data. For example, a cryptographic operation can expose its internal state if the time it takes to perform the operation varies, based on the state. |
잠재적 완화 방법
Phases : Architecture and DesignWhenever possible, specify implementation strategies that do not introduce time variances in operations.
Phases : Implementation
Often one can artificially manipulate the time which operations take or -- when operations occur -- can remove information from the attacker.
Phases : Implementation
It is reasonable to add artificial or random delays so that the amount of CPU time consumed is independent of the action being taken by the application.
취약점 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-462 | Cross-Domain Search Timing
An attacker initiates cross domain HTTP / GET requests and times the server responses. The timing of these responses may leak important information on what is happening on the server. Browser's same origin policy prevents the attacker from directly reading the server responses (in the absence of any other weaknesses), but does not prevent the attacker from timing the responses to requests that the attacker issued cross domain. |
메모
As of CWE 4.9, members of the CWE Hardware SIG are working to improve CWE's coverage of transient execution weaknesses, which include issues related to Spectre, Meltdown, and other attacks that create or exploit covert channels. As a result of that work, this entry might change in CWE 4.10.참고 자료
REF-18
The CLASP Application Security ProcessSecure Software, Inc..
https://cwe.mitre.org/documents/sources/TheCLASPApplicationSecurityProcess.pdf
REF-1431
A Taxonomy of Computer Program Security Flaws, with ExamplesCarl E. Landwehr, Alan R. Bull, John P. McDermott, William S. Choi.
https://cwe.mitre.org/documents/sources/ATaxonomyofComputerProgramSecurityFlawswithExamples%5BLandwehr93%5D.pdf
제출
| 이름 | 조직 | 날짜 | 출시일 | Version |
|---|---|---|---|---|
| Landwehr | Draft 3 |
수정 사항
| 이름 | 조직 | 날짜 | 댓글 |
|---|---|---|---|
| Eric Dalci | Cigital | updated Time_of_Introduction | |
| CWE Content Team | MITRE | updated Common_Consequences, Relationships, Other_Notes, Taxonomy_Mappings | |
| CWE Content Team | MITRE | updated Description | |
| CWE Content Team | MITRE | updated Description, Other_Notes, Potential_Mitigations | |
| CWE Content Team | MITRE | updated Common_Consequences, Description | |
| CWE Content Team | MITRE | updated Description | |
| CWE Content Team | MITRE | updated Common_Consequences | |
| CWE Content Team | MITRE | updated Related_Attack_Patterns, Relationships | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Applicable_Platforms, Demonstrative_Examples | |
| CWE Content Team | MITRE | updated References, Relationships | |
| CWE Content Team | MITRE | updated Maintenance_Notes | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Mapping_Notes | |
| CWE Content Team | MITRE | updated Demonstrative_Examples | |
| CWE Content Team | MITRE | updated References | |
| CWE Content Team | MITRE | updated Weakness_Ordinalities | |
| CWE Content Team | MITRE | updated Common_Consequences, Description, Technical_Nuance |
