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 denial of service.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - QEMU: usbredir: free() call on invalid pointer in bufp_alloc() (CVE-2021-3682)

  - qemu-bridge-helper.c in QEMU 3.1 and 4.0.0 does not ensure that a network interface name (obtained from     bridge.conf or a --br=bridge option) is limited to the IFNAMSIZ size, which can lead to an ACL bypass.
    (CVE-2019-13164)

  - In QEMU 4.2.0, a MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer     dereference. (CVE-2020-15469)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-12152 advisory.

    - virtio-crypto: verify src&dst buffer length for sym request (zhenwei pi) [Orabug: 35724113]     {CVE-2023-3180}
    - hw/scsi/lsi53c895a: Fix reentrancy issues in the LSI controller (CVE-2023-0330) (Thomas Huth) [Orabug:
    35724112] {CVE-2023-0330}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the qemu package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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 denial of service. (CVE-2023-3301)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6567-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-6980 advisory.

    - Fix CVE-2022-2211 Denial of Service in --key parameter       resolves: rhbz#2101280
    - Fixes: CVE-2022-40284
    - Fixes: CVE-2021-46790, CVE-2022-30783, CVE-2022-30784, CVE-2022-30785,       CVE-2022-30786, CVE-2022-30787, CVE-2022-30788, CVE-2022-30789       resolves: rhbz#2127240 rhbz#2127248       (also: 2127233 2127234 2127241 2127249 2127255 2127256 2127262 2127263)
    - Fixes: CVE-2021-33285, CVE-2021-33286, CVE-2021-33287, CVE-2021-33289,       CVE-2021-35266, CVE-2021-35267, CVE-2021-35268, CVE-2021-35269,       CVE-2021-39251, CVE-2021-39252, CVE-2021-39253, CVE-2021-39254       resolves: rhbz#2004490
    - Fix for CVE-2019-9755       (heap-based buffer overflow leads to local root privilege escalation)       resolves: rhbz#1698503
    - Fix CVE-2022-0485: Fail nbdcopy if NBD read or write fails       resolves: rhbz#2045718
    - Contains fix for NBD Protocol Downgrade Attack (CVE-2019-14842).
    - virpci: Resolve leak in virPCIVirtualFunctionList cleanup (CVE-2023-2700)
    - node_device_conf: Avoid memleak in virNodeDeviceGetPCIVPDDynamicCap() (CVE-2023-2700)

    libvirt-python     nbdkit     netcf     perl-Sys-Virt     qemu-kvm
    - Resolves: RHEL-7339       (CVE-2023-3354 virt:rhel/qemu-kvm: QEMU: VNC: improper I/O watch removal in TLS handshake can lead to     remote unauthenticated denial of service [rhel-8.9.0])
    - Resolves: bz#2215786       (CVE-2023-3301 virt:rhel/qemu-kvm: QEMU: net: triggerable assertion due to race condition in hot-unplug     [rhel-8])
    - Resolves: bz#1999236       (CVE-2021-3750 virt:rhel/qemu-kvm: QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free     [rhel-8])

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:6980 advisory.

    Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware     platforms. The virt:rhel module contains packages which provide user-space components used to run virtual     machines using KVM. The packages also provide APIs for managing and interacting with the virtualized     systems.

    Security Fix(es):

    * QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free (CVE-2021-3750)

    * QEMU: net: triggerable assertion due to race condition in hot-unplug (CVE-2023-3301)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.9 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-12855 advisory.

    - storage: Fix returning of locked objects from 'virStoragePoolObjListSearch' (Peter Krempa) [Orabug:
    35644221] {CVE-2023-3750}
    - virpci: Resolve leak in virPCIVirtualFunctionList cleanup (Tim Shearer) [Orabug: 35395469]     {CVE-2023-2700}
    - virtio-crypto: verify src&dst buffer length for sym request (zhenwei pi) [Orabug: 35683774]     {CVE-2023-3180}
    - io: remove io watch if TLS channel is closed during handshake (Daniel P. Berrange) [Orabug: 35683826]     {CVE-2023-3354}
    - ui/vnc-clipboard: fix infinite loop in inflate_buffer (CVE-2023-3255) (Mauro Matteo Cascella) [Orabug:
    35683770] {CVE-2023-3255}
    - hw/scsi/lsi53c895a: Fix reentrancy issues in the LSI controller (CVE-2023-0330) (Thomas Huth) [Orabug:
    35683817] {CVE-2023-0330}
    - vhost-vdpa: do not cleanup the vdpa/vhost-net structures if peer nic is present (Ani Sinha) [Orabug:
    35649138] {CVE-2023-3301}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-12834 advisory.

    - virtio-crypto: verify src&dst buffer length for sym request (Zhenwei Pi)  [Orabug: 35724113]     {CVE-2023-3180}
    - hw/scsi/lsi53c895a: Fix reentrancy issues in the LSI controller (CVE-2023-0330) (Thomas Huth)  [Orabug:
    35724112]  {CVE-2023-0330}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-12835 advisory.

    - virtio-crypto: verify src&dst buffer length for sym request (Zhenwei Pi)  [Orabug: 35724113]     {CVE-2023-3180}
    - hw/scsi/lsi53c895a: Fix reentrancy issues in the LSI controller (CVE-2023-0330) (Thomas Huth)  [Orabug:
    35724112]  {CVE-2023-0330}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3444-1 advisory.

  - An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in     the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for     the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the     host, resulting in a denial of service. (CVE-2021-3638)

  - A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the     Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be     written to the controller's registers and trigger undesirable actions (such as reset) while the device is     still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could     use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or     potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects     QEMU versions before 7.0.0. (CVE-2021-3750)

  - A vulnerability in the lsi53c895a device affects the latest version of qemu. A DMA-MMIO reentrancy problem     may lead to memory corruption bugs like stack overflow or use-after-free. (CVE-2023-0330)

  - 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 buffer overflow when the two values differ.
    (CVE-2023-3180)

  - A design error vulnerability exists in Qemu. The error occurs due to the incorrect cleanup of the     vdpa/vhost-net structures if peer nic is present. (CVE-2023-3301)

  - 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 be in the handshake phase and fails, QEMU cleans up the     connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated     client to cause a denial of service. (CVE-2023-3354)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of QEMU installed on the remote Windows host is affected by a race condition due to the async nature of hot-unplug. 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 denial of service.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3234-1 advisory.

  - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions     up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get     bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the     host resulting in DoS scenario. (CVE-2021-3416) (CVE-2023-2861)

  - A design error vulnerability exists in Qemu. The error occurs due to the incorrect cleanup of the     vdpa/vhost-net structures if peer nic is present. (CVE-2023-3301)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3082-1 advisory.

  - A vulnerability in the lsi53c895a device affects the latest version of qemu. A DMA-MMIO reentrancy problem     may lead to memory corruption bugs like stack overflow or use-after-free. (CVE-2023-0330)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
202320	RHEL 8 : qemu-kvm (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
190433	Oracle Linux 8 : virt:kvm_utils1 (ELSA-2024-12152)	Nessus	Oracle Linux Local Security Checks	medium
188464	EulerOS Virtualization 2.11.0 : qemu (EulerOS-SA-2023-3389)	Nessus	Huawei Local Security Checks	medium
188392	EulerOS Virtualization 2.11.1 : qemu (EulerOS-SA-2023-3371)	Nessus	Huawei Local Security Checks	medium
187683	Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : QEMU vulnerabilities (USN-6567-1)	Nessus	Ubuntu Local Security Checks	high
186110	Oracle Linux 8 : virt:ol / and / virt-devel:rhel (ELSA-2023-6980)	Nessus	Oracle Linux Local Security Checks	high
185690	RHEL 8 : virt:rhel and virt-devel:rhel (RHSA-2023:6980)	Nessus	Red Hat Local Security Checks	high
182741	Oracle Linux 8 : kvm_utils3 (ELSA-2023-12855)	Nessus	Oracle Linux Local Security Checks	high
181814	Oracle Linux 7 : qemu (ELSA-2023-12834)	Nessus	Oracle Linux Local Security Checks	medium
181812	Oracle Linux 7 : qemu (ELSA-2023-12835)	Nessus	Oracle Linux Local Security Checks	medium
180296	SUSE SLES15 Security Update : qemu (SUSE-SU-2023:3444-1)	Nessus	SuSE Local Security Checks	high
179666	QEMU < 8.1.0-rc2 DOS	Nessus	Windows	medium
179577	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : qemu (SUSE-SU-2023:3234-1)	Nessus	SuSE Local Security Checks	high
179196	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : qemu (SUSE-SU-2023:3082-1)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2023-3301

medium

Tenable Plugins

high

medium

medium

medium

high

high

high

high

medium

medium

high

medium

high

high