CVEvulnerability
CVE-2015-2877
3.3 LOW
Official page ↗
- Status
- Modified
- Published
- 2017-03-03
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 3.3 LOW — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CVSS 2.0 ([email protected])
- 2.1 LOW — AV:L/AC:L/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-200
Description
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
Affected configurations
• linux linux kernel (>= 2.6.32 <= 4.20.15)
• redhat enterprise linux 4.0
• redhat enterprise linux 5.0
• redhat enterprise linux 6.0
• redhat enterprise linux 7.0
Related
Weakness · CWE (1)
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness
References
- http://www.antoniobarresi.com/files/cain_advisory.txt Technical Description, Third Party Advisory
- http://www.kb.cert.org/vuls/id/935424 Third Party Advisory, US Government Resource
- http://www.securityfocus.com/bid/76256 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1252096 Issue Tracking, Third Party Advisory
- https://www.kb.cert.org/vuls/id/BGAR-A2CNKG Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH Third Party Advisory, US Government Resource
- https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf Technical Description, Third Party Advisory
- http://www.antoniobarresi.com/files/cain_advisory.txt Technical Description, Third Party Advisory
- http://www.kb.cert.org/vuls/id/935424 Third Party Advisory, US Government Resource
- http://www.securityfocus.com/bid/76256 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1252096 Issue Tracking, Third Party Advisory
- https://www.kb.cert.org/vuls/id/BGAR-A2CNKG Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH Third Party Advisory, US Government Resource
- https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf Technical Description, Third Party Advisory