Note:
This project will be discontinued after December 13, 2021. [more]
2017-03-03
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
Products | Linux_kernel, Enterprise_linux |
Type | Information Exposure (CWE-200) |
First patch | - None (likely due to unavailable code) |
Links |
• https://www.kb.cert.org/vuls/id/BGAR-A2CNKG
• http://www.securityfocus.com/bid/76256 • http://www.antoniobarresi.com/files/cain_advisory.txt • http://www.kb.cert.org/vuls/id/935424 • https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH |