CVE-2017-7518
Published: 23 June 2017
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.
From the Ubuntu Security Team
Andy Lutomirski discovered that the KVM implementation in the Linux kernel was vulnerable to a debug exception error when single-stepping through a syscall. A local attacker in a non-Linux guest vm could possibly use this to gain administrative privileges in the guest vm.
Priority
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.13.0-16.19)
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Not vulnerable
(4.11.0-10.15)
|
|
cosmic |
Not vulnerable
(4.15.0-20.21)
|
|
trusty |
Released
(3.13.0-157.207)
|
|
xenial |
Released
(4.4.0-119.143)
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Ignored
(end of life)
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
linux-armadaxp Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1001.1)
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1007.7)
|
|
trusty |
Released
(4.4.0-1016.16)
|
|
xenial |
Released
(4.4.0-1054.63)
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-flo Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Ignored
(abandoned)
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Does not exist
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Ignored
(end of life, was needed)
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Ignored
(end of life)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-raring Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Ignored
(end of life, was needed)
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Released
(4.4.0-119.143~14.04.1)
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1009.9)
|
|
trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
xenial |
Not vulnerable
(4.11.0-1009.9)
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1003.3~18.04.1)
|
upstream |
Released
(4.12~rc7)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
(4.15.0-1002.2)
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Ignored
(was needed ESM criteria)
|
|
zesty |
Does not exist
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1001.1)
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1006.6)
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-1002.5)
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-8.9~18.04.1)
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1008.8)
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.4.0-1020.25)
|
|
zesty |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.3)
|
upstream |
Released
(4.12~rc7)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1004.5)
|
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
(4.13.0-1008.9)
|
|
zesty |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.12~rc7)
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.12~rc7)
|
|
xenial |
Ignored
(abandoned)
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Does not exist
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.12~rc7)
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.12~rc7)
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(4.13.0-1004.4)
|
bionic |
Not vulnerable
(4.13.0-1005.5)
|
|
cosmic |
Not vulnerable
(4.15.0-1010.11)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.12~rc7)
|
|
xenial |
Released
(4.4.0-1086.94)
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Ignored
(end of life)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1088.93)
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.12~rc7)
|
|
xenial |
Released
(4.4.0-1088.93)
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Ignored
(end of life)
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.12~rc7)
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.8 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7518
- http://www.openwall.com/lists/oss-security/2017/06/23/5
- https://www.spinics.net/lists/kvm/msg151817.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1464473
- https://ubuntu.com/security/notices/USN-3619-1
- https://ubuntu.com/security/notices/USN-3619-2
- https://ubuntu.com/security/notices/USN-3754-1
- NVD
- Launchpad
- Debian