CVE-2017-12134
published 2017-08-24CVE-2017-12134: The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently…
PriorityP340high8.8CVSS 3.0
AVLACLPRLUINSCCHIHAH
EPSS
0.50%
41.8th percentile
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| citrix | citrix_adm | — | — |
| citrix | citrix_hypervisor | — | — |
| citrix | citrix_virtual_apps_and_desktops | — | — |
| citrix | endpoint_management | — | — |
| citrix | netscaler_adc | — | — |
| citrix | netscaler_gateway | — | — |
| citrix | xenserver | — | — |
| citrix | xenserver | — | — |
| citrix | xenserver | — | — |
| citrix | xenserver | — | — |
| citrix | xenserver | — | — |
| citrix | xenserver | — | — |
| citrix | xenserver | — | — |
| debian | linux | < linux 4.12.12-1 (bookworm) | linux 4.12.12-1 (bookworm) |
| linux | linux_kernel | >= 0 < 4.12.12-1 | 4.12.12-1 |
| linux | linux_kernel | >= 0 < 4.12.12-1 | 4.12.12-1 |
| linux | linux_kernel | >= 0 < 4.12.12-1 | 4.12.12-1 |
| linux | linux_kernel | >= 0 < 4.12.12-1 | 4.12.12-1 |
| linux | linux_kernel | >= 0 < 3.13.0-149.199 | 3.13.0-149.199 |
| linux | linux_kernel | >= 0 < 4.4.0-97.120 | 4.4.0-97.120 |
CVSS provenance
nvdv3.08.8HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
nvdv2.07.2HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
osv8.8HIGH
vendor_debian8.8HIGH
vendor_redhat8.8HIGH
vendor_ubuntu8.8HIGH
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Ubuntu
Linux kernel (Trusty HWE) vulnerabilities
vendor_ubuntu·2018-05-22·CVSS 8.8
CVE-2017-12134 [HIGH] Linux kernel (Trusty HWE) vulnerabilities
Title: Linux kernel (Trusty HWE) vulnerabilities
Summary: Several security issues were addressed in the Linux kernel.
USN-3655-1 fixed vulnerabilities and added mitigations 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 ESM.
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An att
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-05-22·CVSS 8.8
CVE-2017-12134 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were addressed in the Linux kernel.
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
It was discovered that the Bluetooth HIP Protocol implementation in the
Linux kernel did not prope
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2017-10-10·CVSS 8.8
CVE-2017-12134 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)
Otto Ebeling discovered that the memory manager in the Linux kernel did not
properly check the effective UID in some situations. A local attacker could
use this to expose sensitive information. (CVE-2017-141
Ubuntu
Linux kernel (Xenial HWE) vulnerabilities
vendor_ubuntu·2017-10-10·CVSS 8.8
CVE-2017-12134 [HIGH] Linux kernel (Xenial HWE) vulnerabilities
Title: Linux kernel (Xenial HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3444-1 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.
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash)
Red Hat
xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)
vendor_redhat·2017-08-15·CVSS 8.8
CVE-2017-12134 [HIGH] xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)
xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
Package: xen (Red Hat Enterprise Linux 5) - Will not fix
Debian
CVE-2017-12134: linux - The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might al...
vendor_debian·2017·CVSS 8.8
CVE-2017-12134 [HIGH] CVE-2017-12134: linux - The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might al...
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
Scope: local
bookworm: resolved (fixed in 4.12.12-1)
bullseye: resolved (fixed in 4.12.12-1)
forky: resolved (fixed in 4.12.12-1)
sid: resolved (fixed in 4.12.12-1)
trixie: resolved (fixed in 4.12.12-1)
Citrix
Citrix Security Bulletin CTX225941
vendor_citrix·CVSS 8.8
CVE-2017-12134 [HIGH] Citrix Security Bulletin CTX225941
Citrix Security Bulletin CTX225941
CVE References: CVE-2017-12134, CVE-2017-12135, CVE-2017-12136, CVE-2017-12137, CVE-2025-12101, CVE-2025-62626, CVE-2026-23554, CVE-2026-3055, CVE-2026-4368, CVE-2026-4397
Affected Products: Citrix ADM, Citrix Hypervisor, Citrix Virtual Apps and Desktops, Endpoint Management, NetScaler ADC, NetScaler Gateway, XenServer
GHSA
GHSA-c46p-g2h9-xcvx: The xen_biovec_phys_mergeable function in drivers/xen/biomerge
ghsa_unreviewed·2022-05-13
CVE-2017-12134 [HIGH] CWE-682 GHSA-c46p-g2h9-xcvx: The xen_biovec_phys_mergeable function in drivers/xen/biomerge
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
OSV
linux vulnerabilities
osv·2018-05-22·CVSS 8.8
CVE-2018-3639 [HIGH] linux vulnerabilities
linux vulnerabilities
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory
reads via a sidechannel attack. This flaw is known as Spectre
Variant 4. A local attacker could use this to expose sensitive
information, including kernel memory. (CVE-2018-3639)
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
It was discovered that the Bluetooth HIP Protocol implementation in the
Linux kernel did not properly validate HID connection setup information. An
attacker could use this to cause a
OSV
linux-lts-xenial vulnerabilities
osv·2017-10-10·CVSS 8.8
[HIGH] linux-lts-xenial vulnerabilities
linux-lts-xenial vulnerabilities
USN-3444-1 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.
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)
Otto Ebeling discovered that the memory manager in the Linux k
OSV
linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
osv·2017-10-10·CVSS 8.8
CVE-2017-12134 [HIGH] linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)
Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)
Otto Ebeling discovered that the memory manager in the Linux kernel did not
properly check the effective UID in some situations. A local attacker could
use this to expose sensitive information. (CVE-2017-14140)
OSV
CVE-2017-12134: The xen_biovec_phys_mergeable function in drivers/xen/biomerge
osv·2017-08-24·CVSS 8.8
CVE-2017-12134 [HIGH] CVE-2017-12134: The xen_biovec_phys_mergeable function in drivers/xen/biomerge
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2017-12134 linux: Fix Xen block IO merge-ability calculation
bugzilla·2017-08-15·CVSS 8.8
CVE-2017-12134 [HIGH] CVE-2017-12134 linux: Fix Xen block IO merge-ability calculation
CVE-2017-12134 linux: Fix Xen block IO merge-ability calculation
+++ This bug was initially created as a clone of Bug #1481765 +++
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
Bugzilla
CVE-2017-12134 CVE-2017-12135 CVE-2017-12136 CVE-2017-12137 CVE-2017-12855 xen: various flaws [fedora-all]
bugzilla·2017-08-15·CVSS 8.8
CVE-2017-12134 [HIGH] CVE-2017-12134 CVE-2017-12135 CVE-2017-12136 CVE-2017-12137 CVE-2017-12855 xen: various flaws [fedora-all]
CVE-2017-12134 CVE-2017-12135 CVE-2017-12136 CVE-2017-12137 CVE-2017-12855 xen: various flaws [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 affect
Bugzilla
CVE-2017-12134 xsa229 xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)
bugzilla·2017-08-02·CVSS 8.8
CVE-2017-12134 [HIGH] CVE-2017-12134 xsa229 xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)
CVE-2017-12134 xsa229 xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)
ISSUE DESCRIPTION
The block layer in Linux may choose to merge adjacent block IO requests.
When Linux is running as a Xen guest, the default merging algorithm is
replaced with a Xen-specific one. When Linux is running as an x86 PV
guest, some BIO's are erroneously merged, corrupting the data stream
to/from the block device.
This can result in incorrect access to an uncontrolled adjacent frame.
IMPACT
A buggy or malicious guest can cause Linux to read or write incorrect
memory when processing a block stream. This could leak information from
other guests in the system or from Xen itself, or be used to DoS or
escalate privilege within the system.
VULNERABLE SYSTEMS
All x86 Xen systems using pvops Lin
http://www.debian.org/security/2017/dsa-3981http://www.openwall.com/lists/oss-security/2017/08/15/4http://www.securityfocus.com/bid/100343http://www.securitytracker.com/id/1039176http://xenbits.xen.org/xsa/advisory-229.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1477656https://security.gentoo.org/glsa/201801-14https://support.citrix.com/article/CTX225941https://usn.ubuntu.com/3655-1/https://usn.ubuntu.com/3655-2/http://www.debian.org/security/2017/dsa-3981http://www.openwall.com/lists/oss-security/2017/08/15/4http://www.securityfocus.com/bid/100343http://www.securitytracker.com/id/1039176http://xenbits.xen.org/xsa/advisory-229.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1477656https://security.gentoo.org/glsa/201801-14https://support.citrix.com/article/CTX225941https://usn.ubuntu.com/3655-1/https://usn.ubuntu.com/3655-2/
2017-08-24
Published