CVE-2015-2877
CVSS V2 Low 2.1
CVSS V3 Low 3.3
Description
** DISPUTED ** Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack. NOTE: the vendor states "Basically if you care about this attack vector, disable deduplication." Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities.
Overview
- CVE ID
- CVE-2015-2877
- Assigner
- cret@cert.org
- Vulnerability Status
- Analyzed
- Published Version
- 2017-03-03T11:59:00
- Last Modified Date
- 2020-06-04T19:29:02
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 2.6.32 | 4.20.15 |
| cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:N/A:N
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 3.3
- Base Severity
- LOW
- Exploitability Score
- 1.8
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf | Technical Description Third Party Advisory |
| https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH | Third Party Advisory US Government Resource |
| https://www.kb.cert.org/vuls/id/BGAR-A2CNKG | Third Party Advisory US Government Resource |
| https://bugzilla.redhat.com/show_bug.cgi?id=1252096 | Issue Tracking Third Party Advisory |
| http://www.securityfocus.com/bid/76256 | Third Party Advisory VDB Entry |
| http://www.kb.cert.org/vuls/id/935424 | Third Party Advisory US Government Resource |
| http://www.antoniobarresi.com/files/cain_advisory.txt | Technical Description Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2015-2877 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2877 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:28:54 | Added to TrackCVE | |||
| 2022-12-02 14:22:24 | cert@cert.org | cret@cert.org | CVE Assigner | updated |
| 2022-12-02 14:22:24 | 2017-03-03T11:59Z | 2017-03-03T11:59:00 | CVE Published Date | updated |
| 2022-12-02 14:22:24 | 2020-06-04T19:29:02 | CVE Modified Date | updated | |
| 2022-12-02 14:22:24 | Analyzed | Vulnerability Status | updated |