A flaw was found in the virtio-net device in QEMU. When enabling the RSS feature on the virtio-net network card, the indirections_table data within RSS becomes controllable. Setting excessively large values may cause an index out-of-bounds issue, potentially resulting in heap overflow access. This flaw allows a privileged user in the guest to crash the QEMU process on the host.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7744-1 advisory.

    It was discovered that QEMU incorrectly handled certain virtio devices. A privileged 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 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-3446)

    It was discovered that QEMU incorrectly handled SDHCI device emulation. A guest attacker could possibly     use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu     22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-3447)

    It was discovered that QEMU incorrectly handled calculating the checksum of a short-sized fragmented     packet. A guest attacker could possibly use this issue to cause QEMU to crash, leading to a denial of     service. This issue only affected Ubuntu 24.04 LTS. (CVE-2024-3567)

    It was discovered that the QEMU qemu-img utility incorrectly handled certain crafted image files. An     attacker could use this issue to cause QEMU to consume resources, leading to a denial of service, or     possibly read and write to an existing external file. This issue only affected Ubuntu 22.04 LTS and Ubuntu     24.04 LTS. (CVE-2024-4467)

    It was discovered that QEMU incorrectly handled the RSS feature on virtio-net devices. 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 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-6505)

    It was discovered that QEMU incorrectly handled the NBD server. An attacker could use this issue to cause     QEMU to consume resources, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS and     Ubuntu 24.04 LTS. (CVE-2024-7409)

    It was discovered that QEMU incorrectly handled certain USB devices. A guest attacker could possibly use     this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 22.04     LTS and Ubuntu 24.04 LTS. (CVE-2024-8354)

    It was discovered that the QEMU package incorrectly set up a binfmt_misc registration with the C     (Credential) flag. A local attacker could use this with a suid/sgid binary to escalate privileges. This     update will no longer run foreign-architecture binaries with suid/sgid with elevated privileges.

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 version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2024:0500 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2024-4467:
    A heap buffer overflow was found in the virtio-snd device in QEMU. When reading input audio in the virtio-     snd input callback, virtio_snd_pcm_in_cb, the function did not check whether the iov can fit the data     buffer. This issue can trigger an out-of-bounds write if the size of the virtio queue element is equal to     virtio_snd_pcm_status, which makes the available space for audio data zero.

    CVE-2024-7730:
    A flaw was found in the virtio-net device in QEMU. When enabling the RSS feature on the virtio-net network     card, the indirections_table data within RSS becomes controllable. Setting excessively large values may     cause an index out-of-bounds issue, potentially resulting in heap overflow access. This flaw allows a     privileged user in the guest to crash the QEMU process on the host.

    CVE-2024-6505:
    A flaw was found in the QEMU disk image utility (qemu-img) 'info' command. A specially crafted image file     containing a `json:{}` value describing block devices in QMP could cause the qemu-img process on the host     to consume large amounts of memory or CPU time, leading to denial of service or read/write to an existing     external file.

    CVE-2024-3567:
    A flaw was found in QEMU. An assertion failure was present in the update_sctp_checksum() function in     hw/net/net_tx_pkt.c when trying to calculate the checksum of a short-sized fragmented packet. This flaw     allows a malicious guest to crash QEMU and cause a denial of service condition.

    CVE-2024-7409:
    A flaw was found in the QEMU NBD Server. This vulnerability allows a denial of service (DoS) attack via     improper synchronization during socket closure when a client keeps a socket open as the server is taken     offline.

    CVE-2024-3446:
    A double free vulnerability was found in QEMU virtio devices (virtio-gpu, virtio-serial-bus, virtio-     crypto), where the mem_reentrancy_guard flag insufficiently protects against DMA reentrancy issues. This     issue could allow a malicious privileged guest to crash the QEMU process on the host, resulting in a     denial of service or allow arbitrary code execution within the context of the QEMU process on the host.

    CVE-2024-3447:
    A heap-based buffer overflow was found in the SDHCI device emulation of QEMU. The bug is triggered when     both `s->data_count` and the size of  `s->fifo_buffer` are set to 0x200, leading to an out-of-bound     access. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial     of service condition.

Tenable has extracted the preceding description block directly from the Tencent 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 version of qemu installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-6505 advisory.

  - A flaw was found in the virtio-net device in QEMU. When enabling the RSS feature on the virtio-net network     card, the indirections_table data within RSS becomes controllable. Setting excessively large values may     cause an index out-of-bounds issue, potentially resulting in heap overflow access. This flaw allows a     privileged user in the guest to crash the QEMU process on the host. (CVE-2024-6505)

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

The version of qemu installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-6505 advisory.

  - A flaw was found in the virtio-net device in QEMU. When enabling the RSS feature on the virtio-net network     card, the indirections_table data within RSS becomes controllable. Setting excessively large values may     cause an index out-of-bounds issue, potentially resulting in heap overflow access. This flaw allows a     privileged user in the guest to crash the QEMU process on the host. (CVE-2024-6505)

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in the virtio-net device in QEMU. When enabling the RSS feature on the virtio-net network     card, the indirections_table data within RSS becomes controllable. Setting excessively large values may     cause an index out-of-bounds issue, potentially resulting in heap overflow access. This flaw allows a     privileged user in the guest to crash the QEMU process on the host. (CVE-2024-6505)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
265091	Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : QEMU vulnerabilities (USN-7744-1)	Nessus	Ubuntu Local Security Checks	medium
238706	TencentOS Server 4: qemu (TSSA-2024:0500)	Nessus	Tencent Local Security Checks	high
235436	Azure Linux 3.0 Security Update: qemu (CVE-2024-6505)	Nessus	Azure Linux Local Security Checks	medium
235188	CBL Mariner 2.0 Security Update: qemu (CVE-2024-6505)	Nessus	MarinerOS Local Security Checks	medium
231559	Linux Distros Unpatched Vulnerability : CVE-2024-6505	Nessus	Misc.	medium

Detections

Analytics

CVE-2024-6505

medium

Tenable Plugins

medium

high

medium

medium

medium