CVE-2016-7094
published 2016-09-21CVE-2016-7094: Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a…
PriorityP413medium4.1CVSS 3.0
AVLACHPRHUINSUCNINAH
EPSS
0.39%
31.4th percentile
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xen | < xen 4.8.0~rc3-1 (bookworm) | xen 4.8.0~rc3-1 (bookworm) |
| xen | xen | <= 4.7.0 | — |
| xen | xen | >= 0 < 4.8.0~rc3-1 | 4.8.0~rc3-1 |
| xen | xen | >= 0 < 4.8.0~rc3-1 | 4.8.0~rc3-1 |
| xen | xen | >= 0 < 4.8.0~rc3-1 | 4.8.0~rc3-1 |
| xen | xen | >= 0 < 4.8.0~rc3-1 | 4.8.0~rc3-1 |
CVSS provenance
nvdv3.04.1MEDIUMCVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
nvdv2.01.5LOWAV:L/AC:M/Au:S/C:N/I:N/A:P
osv4.1MEDIUM
vendor_debian4.1MEDIUM
vendor_redhat4.1MEDIUM
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Red Hat
xen: x86 HVM: Overflow of sh_ctxt->seg_reg[]
vendor_redhat·2016-09-08·CVSS 4.1
CVE-2016-7094 [MEDIUM] xen: x86 HVM: Overflow of sh_ctxt->seg_reg[]
xen: x86 HVM: Overflow of sh_ctxt->seg_reg[]
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.
Package: xen (Red Hat Enterprise Linux 5) - Will not fix
Debian
CVE-2016-7094: xen - Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administr...
vendor_debian·2016·CVSS 4.1
CVE-2016-7094 [MEDIUM] CVE-2016-7094: xen - Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administr...
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.
Scope: local
bookworm: resolved (fixed in 4.8.0~rc3-1)
bullseye: resolved (fixed in 4.8.0~rc3-1)
forky: resolved (fixed in 4.8.0~rc3-1)
sid: resolved (fixed in 4.8.0~rc3-1)
trixie: resolved (fixed in 4.8.0~rc3-1)
GHSA
GHSA-r33r-j3c5-f2xq: Buffer overflow in Xen 4
ghsa_unreviewed·2022-05-17
CVE-2016-7094 [MEDIUM] CWE-119 GHSA-r33r-j3c5-f2xq: Buffer overflow in Xen 4
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.
OSV
CVE-2016-7094: Buffer overflow in Xen 4
osv·2016-09-21·CVSS 4.1
CVE-2016-7094 [MEDIUM] CVE-2016-7094: Buffer overflow in Xen 4
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-7094 xen: x86 HVM: Overflow of sh_ctxt->seg_reg[] [fedora-all]
bugzilla·2016-09-08·CVSS 4.1
CVE-2016-7094 [MEDIUM] CVE-2016-7094 xen: x86 HVM: Overflow of sh_ctxt->seg_reg[] [fedora-all]
CVE-2016-7094 xen: x86 HVM: Overflow of sh_ctxt->seg_reg[] [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: this issue affects multiple supported versions of Fedora
Bugzilla
CVE-2016-7094 xen: x86 HVM: Overflow of sh_ctxt->seg_reg[]
bugzilla·2016-08-26·CVSS 4.1
CVE-2016-7094 [MEDIUM] CVE-2016-7094 xen: x86 HVM: Overflow of sh_ctxt->seg_reg[]
CVE-2016-7094 xen: x86 HVM: Overflow of sh_ctxt->seg_reg[]
ISSUE DESCRIPTION
x86 HVM guests running with shadow paging use a subset of the x86 emulator to
handle the guest writing to its own pagetables. There are situations a guest
can provoke which result in exceeding the space allocated for internal state.
IMPACT
A malicious HVM guest administrator can cause Xen to fail a bug check,
causing a denial of service to the host.
VULNERABLE SYSTEMS
All versions of Xen are vulnerable.
The vulnerability is only exposed to HVM guests on x86 hardware, which are
configured to run with shadow paging.
The vulnerability is not exposed to x86 PV guests, x86 HVM guests running with
hardware assisted paging, or ARM guests.
x86 HVM guests run in HAP mode by default on modern CPUs.
To discover
http://support.citrix.com/article/CTX216071http://www.debian.org/security/2016/dsa-3663http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlhttp://www.securityfocus.com/bid/92864http://www.securitytracker.com/id/1036753http://xenbits.xen.org/xsa/advisory-187.htmlhttp://xenbits.xen.org/xsa/xsa187-0001-x86-shadow-Avoid-overflowing-sh_ctxt-seg_reg.patchhttps://security.gentoo.org/glsa/201611-09http://support.citrix.com/article/CTX216071http://www.debian.org/security/2016/dsa-3663http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlhttp://www.securityfocus.com/bid/92864http://www.securitytracker.com/id/1036753http://xenbits.xen.org/xsa/advisory-187.htmlhttp://xenbits.xen.org/xsa/xsa187-0001-x86-shadow-Avoid-overflowing-sh_ctxt-seg_reg.patchhttps://security.gentoo.org/glsa/201611-09
2016-09-21
Published