⬇ Download holy card: ·
Saint CAIN
Hagiography in preparation at the scriptorium.
Feast day August 12
Technical record
- Disclosed on
- August 12 2015
- CVE
- CVE-2015-2877
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
Sources: comsec-files.ethz.ch · usenix.org