CVE-2018-10853
published 2018-09-11CVE-2018-10853: A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current…
PriorityP339high7.8CVSS 3.0
AVLACLPRLUINSUCHIHAH
EPSS
0.47%
38.0th percentile
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | linux | < linux 4.16.16-1 (bookworm) | linux 4.16.16-1 (bookworm) |
| linux | kernel | — | — |
| linux | linux_kernel | < 4.18 | 4.18 |
| linux | linux_kernel | >= 0 < 4.16.16-1 | 4.16.16-1 |
| linux | linux_kernel | >= 0 < 4.16.16-1 | 4.16.16-1 |
| linux | linux_kernel | >= 0 < 4.16.16-1 | 4.16.16-1 |
| linux | linux_kernel | >= 0 < 4.16.16-1 | 4.16.16-1 |
| linux | linux_kernel | >= 0 < 4.15.0-36.39 | 4.15.0-36.39 |
CVSS provenance
nvdv3.07.8HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
osv7.8HIGH
vendor_debian7.0HIGH
vendor_redhat7.0HIGH
vendor_ubuntu7.0HIGH
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GHSA
GHSA-vhcx-55j8-pv9c: A flaw was found in the way Linux kernel KVM hypervisor before 4
ghsa_unreviewed·2022-05-13
CVE-2018-10853 [HIGH] CWE-269 GHSA-vhcx-55j8-pv9c: A flaw was found in the way Linux kernel KVM hypervisor before 4
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
OSV
linux-hwe, linux-gcp vulnerabilities
osv·2018-10-01·CVSS 7.8
[HIGH] linux-hwe, linux-gcp vulnerabilities
linux-hwe, linux-gcp vulnerabilities
USN-3777-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.
Jann Horn discovered that the vmacache subsystem did not properly handle
sequence number overflows, leading to a use-after-free vulnerability. A
local attacker could use this to cause a denial of service (system crash)
or execute arbitrary code. (CVE-2018-17182)
It was discovered that the paravirtualization implementation in the Linux
kernel did not properly handle some indirect calls, reducing the
effectiveness of Spectre v2 mitigations for paravirtual guests. A local
attacker could use this to expose sensitive information. (CVE-2018-15594)
OSV
linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities
osv·2018-10-01·CVSS 7.8
CVE-2018-17182 [HIGH] linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities
linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities
Jann Horn discovered that the vmacache subsystem did not properly handle
sequence number overflows, leading to a use-after-free vulnerability. A
local attacker could use this to cause a denial of service (system crash)
or execute arbitrary code. (CVE-2018-17182)
It was discovered that the paravirtualization implementation in the Linux
kernel did not properly handle some indirect calls, reducing the
effectiveness of Spectre v2 mitigations for paravirtual guests. A local
attacker could use this to expose sensitive information. (CVE-2018-15594)
It was discovered that microprocessors utilizing speculative execution and
prediction of return addresses via Return Stack Buffer (RSB) may allow
unauthorized memory rea
OSV
CVE-2018-10853: A flaw was found in the way Linux kernel KVM hypervisor before 4
osv·2018-09-11·CVSS 7.8
CVE-2018-10853 [HIGH] CVE-2018-10853: A flaw was found in the way Linux kernel KVM hypervisor before 4
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
Kernel
kvm: x86: use correct privilege level for sgdt/sidt/fxsave/fxrstor access
kernel_security·2018-06-06·CVSS 7.0
CVE-2018-10853 [HIGH] kvm: x86: use correct privilege level for sgdt/sidt/fxsave/fxrstor access
kvm: x86: use correct privilege level for sgdt/sidt/fxsave/fxrstor access
The functions that were used in the emulation of fxrstor, fxsave, sgdt and
sidt were originally meant for task switching, and as such they did not
check privilege levels. This is very bad when the same functions are used
in the emulation of unprivileged instructions. This is CVE-2018-10853.
The obvious fix is to add a new argument to ops->read_std and ops->write_std,
which decides whether the access is a "system" access or should use the
processor's CPL.
Fixes: 129a72a0d3c8 ("KVM: x86: Introduce segmented_write_std", 2017-01-12)
Signed-off-by: Paolo Bonzini
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2018-10-01·CVSS 7.0
CVE-2018-10853 [HIGH] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3777-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.
Jann Horn discovered that the vmacache subsystem did not properly handle
sequence number overflows, leading to a use-after-free vulnerability. A
local attacker could use this to cause a denial of service (system crash)
or execute arbitrary code. (CVE-2018-17182)
It was discovered that the paravirtualization implementation in the Linux
kernel did not properly handle some indirect calls, reducing the
effectiveness of Spectre v2 mitigations for paravirtual guests. A local
at
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-10-01·CVSS 7.0
CVE-2018-10853 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Jann Horn discovered that the vmacache subsystem did not properly handle
sequence number overflows, leading to a use-after-free vulnerability. A
local attacker could use this to cause a denial of service (system crash)
or execute arbitrary code. (CVE-2018-17182)
It was discovered that the paravirtualization implementation in the Linux
kernel did not properly handle some indirect calls, reducing the
effectiveness of Spectre v2 mitigations for paravirtual guests. A local
attacker could use this to expose sensitive information. (CVE-2018-15594)
It was discovered that microprocessors utilizing speculative execution and
prediction of return addresses via Return Stack Buffer (RSB) may allow
u
Red Hat
kernel: kvm: guest userspace to guest kernel write
vendor_redhat·2018-06-05·CVSS 7.0
CVE-2018-10853 [HIGH] CWE-250 kernel: kvm: guest userspace to guest kernel write
kernel: kvm: guest userspace to guest kernel write
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
A flaw was found in the way Linux kernel KVM hypervisor emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
Package: kernel (Red Hat Enterprise Linux 5) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Pa
Debian
CVE-2018-10853: linux - A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated ins...
vendor_debian·2018·CVSS 7.0
CVE-2018-10853 [HIGH] CVE-2018-10853: linux - A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated ins...
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
Scope: local
bookworm: resolved (fixed in 4.16.16-1)
bullseye: resolved (fixed in 4.16.16-1)
forky: resolved (fixed in 4.16.16-1)
sid: resolved (fixed in 4.16.16-1)
trixie: resolved (fixed in 4.16.16-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write
bugzilla·2018-06-11·CVSS 7.0
CVE-2018-10853 [HIGH] CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write
CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write
A flaw was found in the way Linux kernel KVM hypervisor emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions.
An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
Upstream patch:
-> https://git.kernel.org/linus/3c9fa24ca7c9c47605672916491f79e8ccacb9e6
Issue introduced in: (kernel v4.10+)
-> https://git.kernel.org/linus/129a72a0d3c8e139a04512325384fe5ac119e74
Reference:
-> http://www.openwall.com/lists/oss-security/2018/09/02/1
Discussion:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1589892]
---
Acknowledgments:
Name: Andy Lutomirski, Mika Penttilä
Bugzilla
CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write [fedora-all]
bugzilla·2018-06-11·CVSS 7.0
CVE-2018-10853 [HIGH] CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write [fedora-all]
CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported version
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.htmlhttps://access.redhat.com/errata/RHSA-2019:2029https://access.redhat.com/errata/RHSA-2019:2043https://access.redhat.com/errata/RHSA-2020:0036https://access.redhat.com/errata/RHSA-2020:0103https://access.redhat.com/errata/RHSA-2020:0179https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10853https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=129a72a0d3c8e139a04512325384fe5ac119e74https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c9fa24ca7c9c47605672916491f79e8ccacb9e6https://lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00020.htmlhttps://usn.ubuntu.com/3777-1/https://usn.ubuntu.com/3777-2/https://www.openwall.com/lists/oss-security/2018/09/02/1http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.htmlhttps://access.redhat.com/errata/RHSA-2019:2029https://access.redhat.com/errata/RHSA-2019:2043https://access.redhat.com/errata/RHSA-2020:0036https://access.redhat.com/errata/RHSA-2020:0103https://access.redhat.com/errata/RHSA-2020:0179https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10853https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=129a72a0d3c8e139a04512325384fe5ac119e74https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c9fa24ca7c9c47605672916491f79e8ccacb9e6https://lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00020.htmlhttps://usn.ubuntu.com/3777-1/https://usn.ubuntu.com/3777-2/https://www.openwall.com/lists/oss-security/2018/09/02/1
2018-09-11
Published