CVE-2023-2861
published 2023-12-06CVE-2023-2861: A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side…
PriorityP434high7.1CVSS 3.1
AVLACLPRLUINSUCHIHAN
EPSS
0.38%
30.2th percentile
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | qemu | < qemu 1:7.2+dfsg-7+deb12u1 (bookworm) | qemu 1:7.2+dfsg-7+deb12u1 (bookworm) |
| msrc | azl3_qemu_6.2.0-18_on_azure_linux_3.0 | — | — |
| msrc | azl3_qemu_8.2.0-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_qemu_6.2.0-22_on_cbl_mariner_2.0 | — | — |
| qemu | qemu | < 8.1.0 | 8.1.0 |
| qemu | qemu | >= 0 < 1:7.2+dfsg-7+deb12u1 | 1:7.2+dfsg-7+deb12u1 |
| qemu | qemu | >= 0 < 1:8.0.3+dfsg-1 | 1:8.0.3+dfsg-1 |
| qemu | qemu | >= 0 < 1:8.0.3+dfsg-1 | 1:8.0.3+dfsg-1 |
| qemu | qemu | >= 0 < 1:4.2-3ubuntu6.28 | 1:4.2-3ubuntu6.28 |
| qemu | qemu | >= 0 < 1:4.2-3ubuntu6.29 | 1:4.2-3ubuntu6.29 |
| qemu | qemu | >= 0 < 1:6.2+dfsg-2ubuntu6.16 | 1:6.2+dfsg-2ubuntu6.16 |
| qemu | qemu | >= 0 < 1:6.2+dfsg-2ubuntu6.21 | 1:6.2+dfsg-2ubuntu6.21 |
| ubuntu | qemu | — | — |
CVSS provenance
nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
osv7.1HIGH
vendor_ubuntu8.8HIGH
vendor_msrc7.1HIGH
vendor_debian6.0MEDIUM
vendor_redhat6.0MEDIUM
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Ubuntu
QEMU regression
vendor_ubuntu·2026-06-28·CVSS 3.8
CVE-2020-11947 [LOW] QEMU regression
Title: QEMU regression
Summary: USN-8412-1 introduced a regression in QEMU
USN-8412-1 fixed vulnerabilities QEMU. On Ubuntu 20.04 LTS, the fix for
CVE-2024-4467 was incomplete and prevented the creation of boot volumes
from qcow2 images. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause
QEMU to crash, resulting in a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2026-06-09·CVSS 3.8
CVE-2021-3416 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause QEMU
to crash, resulting in a denial of service, or possibly execute arbitrary
code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations, leading to a heap-based buffer over-read. An
attacker could possibly use this issue to expose sensitive information from
the host. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-11947)
Ziming Zhang discovered that the SM501 display driver in QEM
Ubuntu
kvmtool vulnerabilities
vendor_ubuntu·2026-04-13·CVSS 8.8
CVE-2021-45464 [HIGH] kvmtool vulnerabilities
Title: kvmtool vulnerabilities
Summary: Several security issues were fixed in kvmtool.
It was discovered that kvmtool did not properly manage memory under certain
circumstances. A malicious guest attacker could use this issue to cause
kvmtool to crash, leading to a denial of service, or possibly execute
arbitrary code on the host system. (CVE-2021-45464)
It was discovered that kvmtool incorrectly handled the 9p passthrough file
system. A malicious guest attacker could possibly use this issue to open
special files, escape the exported 9p tree, and execute arbitrary code on
the host system. (CVE-2023-2861)
Instructions: In general, a standard system update will make all the necessary changes.
Ubuntu
QEMU regression
vendor_ubuntu·2024-06-06·CVSS 3.2
CVE-2023-2861 [LOW] QEMU regression
Title: QEMU regression
Summary: USN-6567-1 introduced a regression in QEMU.
USN-6567-1 fixed vulnerabilities QEMU. The fix for CVE-2023-2861 was too
restrictive and introduced a behaviour change leading to a regression in
certain environments. This update fixes the problem.
Original advisory details:
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code
CISA ICS
Siemens SCALANCE XCM-/XRM-300
cisa_ics·2024-02-15
Siemens SCALANCE XCM-/XRM-300
ICS Advisory
##
Siemens SCALANCE XCM-/XRM-300
Release DateFebruary 15, 2024
Alert CodeICSA-24-046-11
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SCALANCE XCM-/XRM-300
- Vulnerabilities: Out-of-bounds Write, Incorrect Type Conversion or Cast, Improper Verification of Cryptographic Signature, Improper Access Control, Improper Authentication, Missing Encryption
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2024-01-08·CVSS 3.2
CVE-2023-1544 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code and esclate
privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-24165)
It was discovered that QEMU incorrectly handled the Intel HD audio device.
A malicious guest attacker could use this issue to cause QEMU t
Microsoft
Qemu: 9pfs: improper access control on special files
vendor_msrc·2023-12-12·CVSS 7.1
CVE-2023-2861 [MEDIUM] CWE-284 Qemu: 9pfs: improper access control on special files
Qemu: 9pfs: improper access control on special files
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
fedora: fedora
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.
Red Hat
QEMU: 9pfs: improper access control on special files
vendor_redhat·2023-06-07·CVSS 6.0
CVE-2023-2861 [MEDIUM] CWE-284 QEMU: 9pfs: improper access control on special files
QEMU: 9pfs: improper access control on special files
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
Package: qemu-kvm (Red Hat Enterprise Linux 6) - Not affected
Package: qemu-kvm (Red Hat Enterprise Linux 7) - Not affected
Package: qemu-kvm-ma (Red Hat Enterpri
Debian
CVE-2023-2861: qemu - A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU....
vendor_debian·2023·CVSS 6.0
CVE-2023-2861 [MEDIUM] CVE-2023-2861: qemu - A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU....
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
Scope: local
bookworm: resolved (fixed in 1:7.2+dfsg-7+deb12u1)
bullseye: open
forky: resolved (fixed in 1:8.0.3+dfsg-1)
sid: resolved (fixed in 1:8.0.3+dfsg-1)
trixie: resolved (fixed in 1:8.0.3+dfsg-1)
OSV
qemu regression
osv·2024-06-06·CVSS 3.2
CVE-2023-2861 [LOW] qemu regression
qemu regression
USN-6567-1 fixed vulnerabilities QEMU. The fix for CVE-2023-2861 was too
restrictive and introduced a behaviour change leading to a regression in
certain environments. This update fixes the problem.
Original advisory details:
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code and esclate
privileges. This issue only affected Ubuntu 20.04
OSV
qemu vulnerabilities
osv·2024-01-08·CVSS 3.2
CVE-2020-14394 [LOW] qemu vulnerabilities
qemu vulnerabilities
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code and esclate
privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-24165)
It was discovered that QEMU incorrectly handled the Intel HD audio device.
A malicious guest attacker could use this issue to cause QEMU to crash,
leading to a denial of service. This issue only affe
OSV
CVE-2023-2861: A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU
osv·2023-12-06·CVSS 7.1
CVE-2023-2861 [HIGH] CVE-2023-2861: A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
GHSA
GHSA-6mxq-x623-25h9: A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU
ghsa_unreviewed·2023-12-06
CVE-2023-2861 [MEDIUM] CWE-284 GHSA-6mxq-x623-25h9: A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://access.redhat.com/security/cve/CVE-2023-2861https://bugzilla.redhat.com/show_bug.cgi?id=2219266https://lists.debian.org/debian-lts-announce/2024/03/msg00012.htmlhttps://security.netapp.com/advisory/ntap-20240125-0005/https://security.netapp.com/advisory/ntap-20240229-0002/https://access.redhat.com/security/cve/CVE-2023-2861https://bugzilla.redhat.com/show_bug.cgi?id=2219266https://lists.debian.org/debian-lts-announce/2024/03/msg00012.htmlhttps://security.netapp.com/advisory/ntap-20240125-0005/https://security.netapp.com/advisory/ntap-20240229-0002/
2023-12-06
Published