Summary
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 affected Ubuntu 22.04 LTS.
(CVE-2021-3611)
It was discovered that QEMU incorrectly handled the ATI VGA device. A
malicious guest attacker could use this issue to cause QEMU to crash,
leading to a denial of service. This issue only affected Ubuntu 20.04 LTS.
(CVE-2021-3638)
It was discovered that QEMU incorrectly handled the VMWare paravirtual RDMA
device. A malicious guest attacker could use this issue to cause QEMU to
crash, leading to a denial of service. (CVE-2023-1544)
It was discovered that QEMU incorrectly handled the 9p passthrough
filesystem. A malicious guest attacker could possibly use this issue to
open special files and escape the exported 9p tree. This issue only
affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04.
(CVE-2023-2861)
It was discovered that QEMU incorrectly handled the virtual crypto device.
A malicious guest attacker could use this issue to cause QEMU to crash,
leading to a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04.
(CVE-2023-3180)
It was discovered that QEMU incorrectly handled the built-in VNC server.
A remote authenticated attacker could possibly use this issue to cause QEMU
to stop responding, resulting in a denial of service. This issue only
affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-3255)
It was discovered that QEMU incorrectly handled net device hot-unplugging.
A malicious guest attacker could use this issue to cause QEMU to crash,
leading to a denial of service. This issue only affected Ubuntu 22.04 LTS
and Ubuntu 23.04. (CVE-2023-3301)
It was discovered that QEMU incorrectly handled the built-in VNC server.
A remote attacker could possibly use this issue to cause QEMU to crash,
resulting in a denial of service. This issue only affected Ubuntu 20.04
LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-3354)
It was discovered that QEMU incorrectly handled NVME devices. A malicious
guest attacker could use this issue to cause QEMU to crash, leading to a
denial of service. This issue only affected Ubuntu 23.10. (CVE-2023-40360)
It was discovered that QEMU incorrectly handled NVME devices. A malicious
guest attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly obtain sensitive information. This issue
only affected Ubuntu 23.10. (CVE-2023-4135)
It was discovered that QEMU incorrectly handled SCSI devices. A malicious
guest attacker could use this issue to cause QEMU to crash, leading to a
denial of service. This issue only affected Ubuntu 23.04 and Ubuntu 23.10.
(CVE-2023-42467)
It was discovered that QEMU incorrectly handled certain disk offsets. A
malicious guest attacker could possibly use this issue to gain control of
the host in certain nested virtualization scenarios. (CVE-2023-5088)
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | qemu | 1:4.2-3ubuntu6.28 |
| Ubuntu · 22.04 LTS 22.04:LTS | qemu | 1:6.2+dfsg-2ubuntu6.16 |
Vulnerabilities 11
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High 7.5
Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to b…
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Medium 6.5
Qemu: vnc: infinite loop in inflate_buffer() leads to denial of service
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the `inflate_buffer` function. This could allow a remote authent…
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Medium 6.4
Qemu: improper ide controller reset can lead to mbr overwrite
A bug in QEMU could cause a guest I/O operation otherwise addressed to an arbitrary disk offset to be targeted to offset 0 instead (potentially overwriting the VM's boot code). This could be used, for example, by L2 guests with a virtual disk (vdiskL2) stored…
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Medium 6.0
Qemu: pvrdma: out-of-bounds read in pvrdma_ring_next_elem_read()
A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a crafted guest driver to allocate and initialize a huge number of page tables to be used as a ring of descriptors for CQ and async events, potentially leading t…
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Medium 6.0
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 dev…
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Medium 6.0
Heap buffer overflow in virtio_crypto_sym_op_helper()
A flaw was found in the QEMU virtual crypto device while handling data encryption/decryption requests in virtio_crypto_handle_sym_req. There is no check for the value of `src_len` and `dst_len` in virtio_crypto_sym_op_helper, potentially leading to a heap buf…
-
Medium 5.6
Triggerable assertion due to race condition in hot-unplug
A flaw was found in QEMU. The async nature of hot-unplug enables a race scenario where the net device backend is cleared before the virtio-net pci frontend has been unplugged. A malicious guest could use this time window to trigger an assertion and cause a de…
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Unscored —
An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer…
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Unscored —
An issue was discovered in TCG Accelerator in QEMU 4.2.0, allows local attackers to execute arbitrary code, escalate pr…
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Unscored —
A stack overflow vulnerability was found in the Intel HD Audio device (intel-hda) of QEMU. A malicious guest could use …
-
Unscored —
An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_b…
References
-
report
https://ubuntu.com/security/CVE-2020-14394
-
report
https://ubuntu.com/security/CVE-2020-24165
-
report
https://ubuntu.com/security/CVE-2021-3611
-
report
https://ubuntu.com/security/CVE-2021-3638
-
report
https://ubuntu.com/security/CVE-2023-1544
-
report
https://ubuntu.com/security/CVE-2023-2861
-
report
https://ubuntu.com/security/CVE-2023-3180
-
report
https://ubuntu.com/security/CVE-2023-3255
-
report
https://ubuntu.com/security/CVE-2023-3301
-
report
https://ubuntu.com/security/CVE-2023-3354
-
report
https://ubuntu.com/security/CVE-2023-4135
-
report
https://ubuntu.com/security/CVE-2023-5088
-
report
https://ubuntu.com/security/CVE-2023-40360
-
report
https://ubuntu.com/security/CVE-2023-42467