CVE-2015-2877

LOW EPSS 56.6%
Published Mar 3, 20179y ago · Modified Jun 17, 20262w ago
3.3 CVSS 3.1
Low
Find Similar
Published Mar 3, 2017 9y ago
Last Modified Jun 17, 2026 2w ago

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

CVSS Details

Base Score
3.3
Exploitability
1.8
Impact
1.4
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 Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
56.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥2.6.32  –  ≤4.20.15
redhatenterprise_linux4.0any
redhatenterprise_linux5.0any
redhatenterprise_linux6.0any
redhatenterprise_linux7.0any

References 7

  • antoniobarresi.com http://www.antoniobarresi.com/files/cain_advisory.txt
    Technical DescriptionThird Party Advisory
  • kb.cert.org http://www.kb.cert.org/vuls/id/935424
    Third Party AdvisoryUS Government Resource
  • securityfocus.com http://www.securityfocus.com/bid/76256
    Third Party AdvisoryVDB Entry
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1252096
    Issue TrackingThird Party Advisory
  • kb.cert.org https://www.kb.cert.org/vuls/id/BGAR-A2CNKG
    Third Party AdvisoryUS Government Resource
  • kb.cert.org https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH
    Third Party AdvisoryUS Government Resource
  • usenix.org https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf
    Technical DescriptionThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.