fdctrl_write_data in hw/block/fdc.c in QEMU 5.0.0 has a NULL pointer dereference via a NULL block pointer for the current drive.

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

  - fdctrl_write_data in hw/block/fdc.c in QEMU 5.0.0 has a NULL pointer dereference via a NULL block pointer     for the current drive. (CVE-2020-25741)

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

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - A heap-based buffer overflow was found in QEMU through 5.0.0 in the SDHCI device emulation support. It
    could occur while doing a multi block SDMA transfer via the sdhci_sdma_transfer_multi_blocks() routine in
    hw/sd/sdhci.c. A guest user or process could use this flaw to crash the QEMU process on the host,
    resulting in a denial of service condition, or potentially execute arbitrary code with privileges of the
    QEMU process on the host. (CVE-2020-17380)

  - In QEMU 5.0.0 and earlier, es1370_transfer_audio in hw/audio/es1370.c does not properly validate the frame
    count, which allows guest OS users to trigger an out-of-bounds access during an es1370_write() operation.
    (CVE-2020-13361)

  - In QEMU 5.0.0 and earlier, megasas_lookup_frame in hw/scsi/megasas.c has an out-of-bounds read via a
    crafted reply_queue_head field from a guest OS user. (CVE-2020-13362)

  - An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before
    5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its
    'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the
    QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the
    privileges of the QEMU process on the host. (CVE-2020-14364)

  - hw/net/xgmac.c in the XGMAC Ethernet controller in QEMU before 07-20-2020 has a buffer overflow. This
    occurs during packet transmission and affects the highbank and midway emulated machines. A guest user or
    process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or
    potential privileged code execution. This was fixed in commit 5519724a13664b43e225ca05351c60b4468e4555.
    (CVE-2020-15863)

ID	Name	Product	Family	Severity
229930	Linux Distros Unpatched Vulnerability : CVE-2020-25741	Nessus	Misc.	low
406788	Alpine: multiple qemu packages: security update to 5.1.0-r1	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
406788	Alpine: multiple qemu packages: security update to 5.1.0-r1	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium

Detections

Analytics

CVE-2020-25741

low

Tenable Plugins

low

medium

medium