4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
26.7%
A flaw was found in the Linux kernel before version 4.12 in the way the KVM
module processed the trap flag(TF) bit in EFLAGS during emulation of the
syscall instruction, which leads to a debug exception(#DB) being raised in
the guest stack. A user/process inside a guest could use this flaw to
potentially escalate their privileges inside the guest. Linux guests are
not affected by this.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 14.04 | noarch | linux | < 3.13.0-157.207 | UNKNOWN |
ubuntu | 16.04 | noarch | linux | < 4.4.0-119.143 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1016.16 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1054.63 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-gcp | < 4.13.0-1002.5 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-hwe | < 4.13.0-26.29~16.04.2 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-hwe-edge | < 4.13.0-26.29~16.04.2 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-kvm | < 4.4.0-1020.25 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-lts-xenial | < 4.4.0-119.143~14.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-raspi2 | < 4.4.0-1086.94 | UNKNOWN |
www.openwall.com/lists/oss-security/2017/06/23/5
bugzilla.redhat.com/show_bug.cgi?id=1464473
launchpad.net/bugs/cve/CVE-2017-7518
nvd.nist.gov/vuln/detail/CVE-2017-7518
security-tracker.debian.org/tracker/CVE-2017-7518
ubuntu.com/security/notices/USN-3619-1
ubuntu.com/security/notices/USN-3619-2
ubuntu.com/security/notices/USN-3754-1
www.cve.org/CVERecord?id=CVE-2017-7518
www.spinics.net/lists/kvm/msg151817.html
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
26.7%