Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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

Published

2017-03-03T11:59:00.147

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 3.3 (LOW)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:N/A:N

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	≤ 4.20.15	Yes
Operating System	redhat	enterprise_linux	4.0	Yes
Operating System	redhat	enterprise_linux	5.0	Yes
Operating System	redhat	enterprise_linux	6.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes

References

http://www.antoniobarresi.com/files/cain_advisory.txt Technical Description, Third Party Advisory ([email protected])
http://www.kb.cert.org/vuls/id/935424 Third Party Advisory, US Government Resource ([email protected])
http://www.securityfocus.com/bid/76256 Third Party Advisory, VDB Entry ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1252096 Issue Tracking, Third Party Advisory ([email protected])
https://www.kb.cert.org/vuls/id/BGAR-A2CNKG Third Party Advisory, US Government Resource ([email protected])
https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH Third Party Advisory, US Government Resource ([email protected])
https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf Technical Description, Third Party Advisory ([email protected])
http://www.antoniobarresi.com/files/cain_advisory.txt Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.kb.cert.org/vuls/id/935424 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/76256 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1252096 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/BGAR-A2CNKG Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)