CVE-2016-3157
published 2016-04-12CVE-2016-3157: The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local…
PriorityP340high7.8CVSS 3.0
AVLACLPRLUINSUCHIHAH
EPSS
0.51%
40.3th percentile
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| debian | linux | < linux 4.5.1-1 (bookworm) | linux 4.5.1-1 (bookworm) |
| linux | linux_kernel | >= 0 < 4.5.1-1 | 4.5.1-1 |
| linux | linux_kernel | >= 0 < 4.5.1-1 | 4.5.1-1 |
| linux | linux_kernel | >= 0 < 4.5.1-1 | 4.5.1-1 |
| linux | linux_kernel | >= 0 < 4.5.1-1 | 4.5.1-1 |
| linux | linux_kernel | >= 0 < 3.13.0-86.130 | 3.13.0-86.130 |
| linux | linux_kernel | >= 0 < 4.4.0-22.39 | 4.4.0-22.39 |
| xen | xen | — | — |
CVSS provenance
nvdv3.07.8HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.2HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
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GHSA
GHSA-jpwx-jg65-3x5w: The __switch_to function in arch/x86/kernel/process_64
ghsa_unreviewed·2022-05-17
CVE-2016-3157 [HIGH] GHSA-jpwx-jg65-3x5w: The __switch_to function in arch/x86/kernel/process_64
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
OSV
linux vulnerabilities
osv·2016-05-09·CVSS 7.2
CVE-2015-7515 [HIGH] linux vulnerabilities
linux vulnerabilities
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Ben Hawkes discovered that the Linux kernel's AIO interface allowed single
writes greater than 2GB, which could cause an integer overflow when writing
to certain filesystems, socket or device types. A local attacker could this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2015-8830)
It was discovered that the Linux kernel did not keep accurate track of pipe
buffer details when error conditions occurred, due to an incomplete fix for
CVE-2015-1805. A local attacker could use this to c
OSV
linux-lts-wily vulnerabilities
osv·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] linux-lts-wily vulnerabilities
linux-lts-wily vulnerabilities
USN-2971-1 fixed vulnerabilities in the Linux kernel for Ubuntu 15.10.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 15.10 for Ubuntu 14.04 LTS.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value. A local attacker could use this
to bypass the kernel's poison-pointer protection mechanism while attempting
to exploit an existing kernel vulnerability. (CVE-2016-0821)
Ralf Spenneberg discover
OSV
linux-lts-vivid vulnerabilities
osv·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] linux-lts-vivid vulnerabilities
linux-lts-vivid vulnerabilities
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Ben Hawkes discovered that the Linux kernel's AIO interface allowed single
writes greater than 2GB, which could cause an integer overflow when writing
to certain filesystems, socket or device types. A local attacker could this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2015-8830)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value. A local attacker could use this
to bypass the kernel's poison-pointer prote
OSV
linux-lts-utopic vulnerabilities
osv·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] linux-lts-utopic vulnerabilities
linux-lts-utopic vulnerabilities
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Ben Hawkes discovered that the Linux kernel's AIO interface allowed single
writes greater than 2GB, which could cause an integer overflow when writing
to certain filesystems, socket or device types. A local attacker could this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2015-8830)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value. A local attacker could use this
to bypass the kernel's poison-pointer prot
OSV
linux vulnerabilities
osv·2016-05-06·CVSS 4.6
CVE-2016-4557 [MEDIUM] linux vulnerabilities
linux vulnerabilities
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges. (CVE-2016-4557)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB device descriptors. An attacker
with physical access could use this to cause a denial of service (system
crash). (CVE-2016-2185)
Ralf Spenneb
OSV
linux-lts-xenial vulnerabilities
osv·2016-05-06·CVSS 4.6
[MEDIUM] linux-lts-xenial vulnerabilities
linux-lts-xenial vulnerabilities
USN-2965-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges. (CVE-2016-4557)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the
OSV
linux-raspi2 vulnerabilities
osv·2016-05-06·CVSS 4.6
CVE-2016-4557 [MEDIUM] linux-raspi2 vulnerabilities
linux-raspi2 vulnerabilities
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges. (CVE-2016-4557)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB device descriptors. An attacker
with physical access could use this to cause a denial of service (system
crash). (CVE-2016-2185)
Ralf
OSV
linux-snapdragon vulnerability
osv·2016-05-06·CVSS 4.6
[MEDIUM] linux-snapdragon vulnerability
linux-snapdragon vulnerability
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges.
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB device descriptors. An attacker
with physical access could use this to cause a denial of service (system
crash). (CVE-2016-2185)
Ralf Spenneberg dis
OSV
CVE-2016-3157: The __switch_to function in arch/x86/kernel/process_64
osv·2016-04-12·CVSS 7.8
CVE-2016-3157 [HIGH] CVE-2016-3157: The __switch_to function in arch/x86/kernel/process_64
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
Ubuntu
Linux kernel (OMAP4) vulnerabilities
vendor_ubuntu·2016-06-10·CVSS 7.8
CVE-2016-1583 [HIGH] Linux kernel (OMAP4) vulnerabilities
Title: Linux kernel (OMAP4) vulnerabilities
Summary: Several security issues were fixed in the kernel.
Jann Horn discovered that eCryptfs improperly attempted to use the mmap()
handler of a lower filesystem that did not implement one, causing a
recursive page fault to occur. A local unprivileged attacker could use to
cause a denial of service (system crash) or possibly execute arbitrary code
with administrative privileges. (CVE-2016-1583)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2016-06-10·CVSS 7.8
CVE-2016-1583 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
Jann Horn discovered that eCryptfs improperly attempted to use the mmap()
handler of a lower filesystem that did not implement one, causing a
recursive page fault to occur. A local unprivileged attacker could use to
cause a denial of service (system crash) or possibly execute arbitrary code
with administrative privileges. (CVE-2016-1583)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB device d
Ubuntu
Linux kernel (Wily HWE) vulnerabilities
vendor_ubuntu·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] Linux kernel (Wily HWE) vulnerabilities
Title: Linux kernel (Wily HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
USN-2971-1 fixed vulnerabilities in the Linux kernel for Ubuntu 15.10.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 15.10 for Ubuntu 14.04 LTS.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value. A local attacker could use this
to bypass the kernel's poison-pointer protection mechanism while attempting
to exploit
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2016-05-09·CVSS 7.2
CVE-2015-7515 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Ben Hawkes discovered that the Linux kernel's AIO interface allowed single
writes greater than 2GB, which could cause an integer overflow when writing
to certain filesystems, socket or device types. A local attacker could this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2015-8830)
It was discovered that the Linux kernel did not keep accurate track of pipe
buffer details when error conditions occurred, due to
Ubuntu
Linux kernel (Utopic HWE) vulnerabilities
vendor_ubuntu·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] Linux kernel (Utopic HWE) vulnerabilities
Title: Linux kernel (Utopic HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Ben Hawkes discovered that the Linux kernel's AIO interface allowed single
writes greater than 2GB, which could cause an integer overflow when writing
to certain filesystems, socket or device types. A local attacker could this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2015-8830)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value
Ubuntu
Linux kernel (Vivid HWE) vulnerabilities
vendor_ubuntu·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] Linux kernel (Vivid HWE) vulnerabilities
Title: Linux kernel (Vivid HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Ben Hawkes discovered that the Linux kernel's AIO interface allowed single
writes greater than 2GB, which could cause an integer overflow when writing
to certain filesystems, socket or device types. A local attacker could this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2015-8830)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value.
Ubuntu
Linux kernel (Trusty HWE) vulnerabilities
vendor_ubuntu·2016-05-09·CVSS 7.2
CVE-2015-7515 [HIGH] Linux kernel (Trusty HWE) vulnerabilities
Title: Linux kernel (Trusty HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
USN-2968-1 fixed vulnerabilities in the Linux kernel for Ubuntu
14.04 LTS. This update provides the corresponding updates for the
Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for
Ubuntu 12.04 LTS.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Ben Hawkes discovered that the Linux kernel's AIO interface allowed single
writes greater than 2GB, which could cause an integer overflow when writing
to certain filesystems, socket or device types. A local attacker could this
Ubuntu
Linux kernel (Raspberry Pi 2) vulnerabilities
vendor_ubuntu·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] Linux kernel (Raspberry Pi 2) vulnerabilities
Title: Linux kernel (Raspberry Pi 2) vulnerabilities
Summary: Several security issues were fixed in the kernel.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value. A local attacker could use this
to bypass the kernel's poison-pointer protection mechanism while attempting
to exploit an existing kernel vulnerability. (CVE-2016-0821)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physi
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2016-05-09·CVSS 4.6
CVE-2015-7515 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the
Linux kernel did not properly validate the endpoints reported by the
device. An attacker with physical access could cause a denial of service
(system crash). (CVE-2015-7515)
Zach Riggle discovered that the Linux kernel's list poison feature did not
take into account the mmap_min_addr value. A local attacker could use this
to bypass the kernel's poison-pointer protection mechanism while attempting
to exploit an existing kernel vulnerability. (CVE-2016-0821)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could
Ubuntu
Linux kernel (Xenial HWE) vulnerabilities
vendor_ubuntu·2016-05-06·CVSS 4.6
CVE-2016-2184 [MEDIUM] Linux kernel (Xenial HWE) vulnerabilities
Title: Linux kernel (Xenial HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
USN-2965-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges. (CVE-2016-4557)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of
Ubuntu
Linux kernel (Qualcomm Snapdragon) vulnerability
vendor_ubuntu·2016-05-06·CVSS 4.6
CVE-2016-4557 [MEDIUM] Linux kernel (Qualcomm Snapdragon) vulnerability
Title: Linux kernel (Qualcomm Snapdragon) vulnerability
Summary: Several security issues were fixed in the kernel.
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges.
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB device descriptors. An attacker
with physical access could use t
Ubuntu
Linux kernel (Raspberry Pi 2) vulnerabilities
vendor_ubuntu·2016-05-06·CVSS 4.6
CVE-2016-2184 [MEDIUM] Linux kernel (Raspberry Pi 2) vulnerabilities
Title: Linux kernel (Raspberry Pi 2) vulnerabilities
Summary: Several security issues were fixed in the kernel.
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges. (CVE-2016-4557)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB device descriptors. An attacker
with physical acces
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2016-05-06·CVSS 4.6
CVE-2016-2184 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
implementation in the Linux kernel did not properly reference count file
descriptors, leading to a use-after-free. A local unprivileged attacker
could use this to gain administrative privileges. (CVE-2016-4557)
Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
did not properly validate USB device descriptors. An attacker with physical
access could use this to cause a denial of service (system crash).
(CVE-2016-2184)
Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
Linux kernel did not properly validate USB device descriptors. An attacker
with physical access could use this
Red Hat
kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)
vendor_redhat·2016-03-16·CVSS 7.8
CVE-2016-3157 [HIGH] CWE-250 kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)
kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
A flaw in the Linux kernel was found in the way IOPL was handled during context switches in 64-bit Xen PV guests. A local guest user could potentially use this flaw to escalate their privileges in the guest.
Package: kernel (Red Hat Enterprise Linux 5) - Will not fix
Package: kernel (Red Hat Enterprise Linux 6) - Affected
Package: kernel (Red Hat Enterprise Linux 7) - Will not fix
Package:
Debian
CVE-2016-3157: linux - The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel doe...
vendor_debian·2016·CVSS 7.8
CVE-2016-3157 [HIGH] CVE-2016-3157: linux - The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel doe...
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
Scope: local
bookworm: resolved (fixed in 4.5.1-1)
bullseye: resolved (fixed in 4.5.1-1)
forky: resolved (fixed in 4.5.1-1)
sid: resolved (fixed in 4.5.1-1)
trixie: resolved (fixed in 4.5.1-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-3157 kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171) [fedora-all]
bugzilla·2016-03-29·CVSS 7.8
CVE-2016-3157 [HIGH] CVE-2016-3157 kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171) [fedora-all]
CVE-2016-3157 kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171) [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.
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: t
Bugzilla
CVE-2016-3157 kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)
bugzilla·2016-03-08·CVSS 7.8
CVE-2016-3157 [HIGH] CVE-2016-3157 kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)
CVE-2016-3157 kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)
It was reported that any 64-bit Xen PV domain with IO port access privileges and any user programs that use iopl(3) is vulnerable to privilege escalations by unprivileged programs running in the same PV domain.
Discussion:
Acknowledgments:
Name: Andy Lutomirski
---
Created attachment 1134161
Patch 1
selftests/x86: Add a iopl test
---
Created attachment 1134162
Patch 2
x86/iopl/64: Properly context-switch IOPL on Xen PV
---
Created attachment 1134163
Patch 3
x86/iopl: Fix iopl capability check on Xen PV
---
Note that patches are not yet reviewed.
---
ISSUE DESCRIPTION
IRET and POPF do not modify EFLAGS.IOPL when executed by code at a
privilege level other than
http://www.debian.org/security/2016/dsa-3607http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlhttp://www.securityfocus.com/bid/84594http://www.securitytracker.com/id/1035308http://www.ubuntu.com/usn/USN-2968-1http://www.ubuntu.com/usn/USN-2968-2http://www.ubuntu.com/usn/USN-2969-1http://www.ubuntu.com/usn/USN-2970-1http://www.ubuntu.com/usn/USN-2971-1http://www.ubuntu.com/usn/USN-2971-2http://www.ubuntu.com/usn/USN-2971-3http://www.ubuntu.com/usn/USN-2996-1http://www.ubuntu.com/usn/USN-2997-1http://xenbits.xen.org/xsa/advisory-171.htmlhttp://www.debian.org/security/2016/dsa-3607http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlhttp://www.securityfocus.com/bid/84594http://www.securitytracker.com/id/1035308http://www.ubuntu.com/usn/USN-2968-1http://www.ubuntu.com/usn/USN-2968-2http://www.ubuntu.com/usn/USN-2969-1http://www.ubuntu.com/usn/USN-2970-1http://www.ubuntu.com/usn/USN-2971-1http://www.ubuntu.com/usn/USN-2971-2http://www.ubuntu.com/usn/USN-2971-3http://www.ubuntu.com/usn/USN-2996-1http://www.ubuntu.com/usn/USN-2997-1http://xenbits.xen.org/xsa/advisory-171.html
2016-04-12
Published