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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2024-08-06T05:32:20.252Z

Reserved: 2015-04-03T00:00:00

Link: CVE-2015-2877

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2017-03-03T11:59:00.147

Modified: 2025-04-20T01:37:25.860

Link: CVE-2015-2877

cve-icon Redhat

Severity : Low

Publid Date: 2015-08-05T00:00:00Z

Links: CVE-2015-2877 - Bugzilla

cve-icon OpenCVE Enrichment

No data.