CVE-2017-7493
published 2017-05-17CVE-2017-7493: Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It…
PriorityP336high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.37%
29.3th percentile
Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | qemu | < qemu 1:2.8+dfsg-6 (bookworm) | qemu 1:2.8+dfsg-6 (bookworm) |
| qemu | qemu | <= 2.9.1 | — |
| qemu | qemu | — | — |
| qemu | qemu | >= 0 < 1:2.8+dfsg-6 | 1:2.8+dfsg-6 |
| qemu | qemu | >= 0 < 1:2.8+dfsg-6 | 1:2.8+dfsg-6 |
| qemu | qemu | >= 0 < 1:2.8+dfsg-6 | 1:2.8+dfsg-6 |
| qemu | qemu | >= 0 < 1:2.8+dfsg-6 | 1:2.8+dfsg-6 |
| qemu | qemu | >= 0 < 2.0.0+dfsg-2ubuntu1.36 | 2.0.0+dfsg-2ubuntu1.36 |
| qemu | qemu | >= 0 < 2.0.0+dfsg-2ubuntu1.35 | 2.0.0+dfsg-2ubuntu1.35 |
| qemu | qemu | >= 0 < 1:2.5+dfsg-5ubuntu10.16 | 1:2.5+dfsg-5ubuntu10.16 |
| qemu | qemu | >= 0 < 1:2.5+dfsg-5ubuntu10.15 | 1:2.5+dfsg-5ubuntu10.15 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/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_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
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Ubuntu
QEMU regression
vendor_ubuntu·2017-09-20·CVSS 7.8
CVE-2017-9375 [HIGH] QEMU regression
Title: QEMU regression
Summary: USN-3414-1 introduced a regression in QEMU.
USN-3414-1 fixed vulnerabilities in QEMU. The patch backport for
CVE-2017-9375 was incomplete and caused a regression in the USB xHCI
controller emulation support. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control.
A guest attacker could use this issue to elevate privileges inside the
guest. (CVE-2017-7493)
Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation.
A privileged attacker inside the guest could use this issue to cause QEMU
to consume resources or crash, resulting in a denial of service.
(CVE-2017-8112)
It was discovered that QEMU incorrectly handled MegaRAID SA
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2017-09-13·CVSS 7.8
CVE-2017-10664 [HIGH] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control.
A guest attacker could use this issue to elevate privileges inside the
guest. (CVE-2017-7493)
Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation.
A privileged attacker inside the guest could use this issue to cause QEMU
to consume resources or crash, resulting in a denial of service.
(CVE-2017-8112)
It was discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host
Bus Adapter emulation support. A privileged attacker inside the guest could
use this issue to cause QEMU to crash, resulting in a denial of service, or
possibly to obtain sensitive host memory. This issue only affected Ubuntu
16.04 LTS and U
Red Hat
Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode
vendor_redhat·2017-05-16·CVSS 7.8
CVE-2017-7493 [HIGH] CWE-284 Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode
Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode
Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.
Package: kvm (Red Hat Enterprise Linux 5) - Not affected
Package: xen (Red Hat Enterprise Linux 5) - Not affected
Package: qemu-kvm (Red Hat Enterprise Linux 6) - Not affected
Package: qemu-kvm (Red Hat Enterprise Linux 7) - Not affected
Package: qemu-kvm-rhev (Red Hat Enterprise Linux 7) - Not affected
Package: qemu-kvm-rhev (Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)) - Not affected
Package:
Debian
CVE-2017-7493: qemu - Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 F...
vendor_debian·2017·CVSS 7.8
CVE-2017-7493 [HIGH] CVE-2017-7493: qemu - Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 F...
Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.
Scope: local
bookworm: resolved (fixed in 1:2.8+dfsg-6)
bullseye: resolved (fixed in 1:2.8+dfsg-6)
forky: resolved (fixed in 1:2.8+dfsg-6)
sid: resolved (fixed in 1:2.8+dfsg-6)
trixie: resolved (fixed in 1:2.8+dfsg-6)
GHSA
GHSA-w8mx-2pfw-8h8q: Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control
ghsa_unreviewed·2022-05-13
CVE-2017-7493 [HIGH] CWE-732 GHSA-w8mx-2pfw-8h8q: Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control
Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.
OSV
qemu regression
osv·2017-09-20·CVSS 7.8
CVE-2017-9375 [HIGH] qemu regression
qemu regression
USN-3414-1 fixed vulnerabilities in QEMU. The patch backport for
CVE-2017-9375 was incomplete and caused a regression in the USB xHCI
controller emulation support. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control.
A guest attacker could use this issue to elevate privileges inside the
guest. (CVE-2017-7493)
Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation.
A privileged attacker inside the guest could use this issue to cause QEMU
to consume resources or crash, resulting in a denial of service.
(CVE-2017-8112)
It was discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host
Bus Adapter emulation support. A privileged at
OSV
qemu vulnerabilities
osv·2017-09-13·CVSS 7.8
CVE-2017-7493 [HIGH] qemu vulnerabilities
qemu vulnerabilities
Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control.
A guest attacker could use this issue to elevate privileges inside the
guest. (CVE-2017-7493)
Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation.
A privileged attacker inside the guest could use this issue to cause QEMU
to consume resources or crash, resulting in a denial of service.
(CVE-2017-8112)
It was discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host
Bus Adapter emulation support. A privileged attacker inside the guest could
use this issue to cause QEMU to crash, resulting in a denial of service, or
possibly to obtain sensitive host memory. This issue only affected Ubuntu
16.04 LTS and Ubuntu 17.04. (CVE-2017-8380)
Li Qiang discovered that QEMU i
OSV
CVE-2017-7493: Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control
osv·2017-05-17·CVSS 7.8
CVE-2017-7493 [HIGH] CVE-2017-7493: Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control
Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2017-7493 Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode [fedora-all]
bugzilla·2017-05-17·CVSS 7.8
CVE-2017-7493 [HIGH] CVE-2017-7493 Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode [fedora-all]
CVE-2017-7493 Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode [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 support
Bugzilla
CVE-2017-7493 Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode
bugzilla·2017-05-17·CVSS 7.8
CVE-2017-7493 [HIGH] CVE-2017-7493 Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode
CVE-2017-7493 Qemu: 9pfs: guest privilege escalation in virtfs mapped-file mode
Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9
File System(9pfs) support, is vulnerable to an improper access control issue.
It could occur while accessing virtfs metadata files in mapped-file security
mode.
A guest user could use this flaw to escalate their privileges inside guest.
Upstream patches:
-> https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.html
Reference:
-> http://www.openwall.com/lists/oss-security/2017/05/17/6
Discussion:
Acknowledgments:
Name: Leo Gaspard
---
Created qemu tracking bugs for this issue:
Affects: fedora-all [bug 1451711]
http://seclists.org/oss-sec/2017/q2/278http://www.securityfocus.com/bid/98574https://bugzilla.redhat.com/show_bug.cgi?id=1451709https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlhttps://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.htmlhttps://security.gentoo.org/glsa/201706-03http://seclists.org/oss-sec/2017/q2/278http://www.securityfocus.com/bid/98574https://bugzilla.redhat.com/show_bug.cgi?id=1451709https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlhttps://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.htmlhttps://security.gentoo.org/glsa/201706-03
2017-05-17
Published