hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an address near the end of the PCI configuration space.

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

  - The ehci_process_itd function in hw/usb/hcd-ehci.c in QEMU allows local guest OS administrators to cause a     denial of service (infinite loop and CPU consumption) via a circular isochronous transfer descriptor (iTD)     list. (CVE-2015-8558)

  - Memory leak in the v9fs_xattrcreate function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local     guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) via a     large number of Txattrcreate messages with the same fid number. (CVE-2016-9102)

  - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address     in an msi-x mmio operation. (CVE-2020-13754)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an     address near the end of the PCI configuration space. (CVE-2020-13791)

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

  - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)

  - pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because     pci_get_bus() might not return a valid pointer. (CVE-2020-25742)

  - hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check     before an ide_cancel_dma_sync call. (CVE-2020-25743)

  - A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in     versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function     while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the     host, resulting in a denial of service. The highest threat from this vulnerability is to system     availability. (CVE-2020-35503)

  - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It     may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A     privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
    (CVE-2021-20203)

  - A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator     of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw     allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a     denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20255)

  - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing     transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid     values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The     highest threat from this vulnerability is to system availability. (CVE-2021-20257)

  - A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could     occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the     floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on     the host resulting in DoS scenario, or potential information leakage from the host memory. (CVE-2021-3507)

  - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions     prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-     bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this     flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the     host. (CVE-2021-3713)

  - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the     descriptor's address belongs to the non direct access region, due to num_buffers being set after the     virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a     denial of service condition, or potentially execute code on the host with the privileges of the QEMU     process. (CVE-2021-3748)

  - 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)

  - An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE     SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious     guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
    (CVE-2021-3930)

  - A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc()     function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer     overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or     potentially execute arbitrary code within the context of the QEMU process. (CVE-2021-4206)

  - A flaw was found in the virtio-net device of QEMU. This flaw was inadvertently introduced with the fix for     CVE-2021-3748, which forgot to unmap the cached virtqueue elements on error, leading to memory leakage and     other unexpected results. Affected QEMU version: 6.2.0. (CVE-2022-26353)

  - An out-of-bounds read flaw was found in the QXL display device emulation in QEMU. The qxl_phys2virt()     function does not check the size of the structure pointed to by the guest physical address, potentially     reading past the end of the bar space into adjacent pages. A malicious guest user could use this flaw to     crash the QEMU process on the host causing a denial of service condition. (CVE-2022-4144)

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.

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

  - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read     during sdhci_write() operations. A guest OS user can crash the QEMU process. (CVE-2020-13253)

  - 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)

  - address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.
    (CVE-2020-13659)

  - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address     in an msi-x mmio operation. (CVE-2020-13754)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an     address near the end of the PCI configuration space. (CVE-2020-13791)

  - In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects     the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the     QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in     hw/net/net_tx_pkt.c. (CVE-2020-16092)

  - 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)

  - QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c     mishandles a write operation in the SDHC_BLKSIZE case. (CVE-2020-25085)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host     controller driver. (CVE-2020-25624)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop when a TD list has a loop. (CVE-2020-25625)

  - eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest     can crash the QEMU process via packet data that lacks a valid Layer 3 protocol. (CVE-2020-27617)

  - hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.
    (CVE-2020-28916)

  - The patch for CVE-2020-17380/CVE-2020-25085 was found to be ineffective, thus making QEMU vulnerable to     the out-of-bounds read/write access issues previously found in the SDHCI controller emulation code. This     flaw allows a malicious privileged guest to crash the QEMU process on the host, resulting in a denial of     service or potential code execution. QEMU up to (including) 5.2.0 is affected by this. (CVE-2021-3409)

  - 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)

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.

According to the versions of the qemu-kvm packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - 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-2021-34161)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to     trigger an out-of-bounds access by providing an address     near the end of the PCI configuration     space.(CVE-2020-13791)

  - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to     trigger an out-of-bounds access via a crafted address     in an msi-x mmio operation.(CVE-2020-13754)

  - 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)

  - QEMU 5.0.0 has a heap-based Buffer Overflow in     flatview_read_continue in exec.c because hw/sd/sdhci.c     mishandles a write operation in the SDHC_BLKSIZE case.
    (CVE-2020-25085)

  - The patch for CVE-2020-17380/CVE-2020-25085 was found     to be ineffective, thus making QEMU vulnerable to the     out-of-bounds read/write access issues previously found     in the SDHCI controller emulation code. This flaw     allows a malicious privileged guest to crash the QEMU     process on the host, resulting in a denial of service     or potential code execution. QEMU up to (including)     5.2.0 is affected by this. (CVE-2021-3409)

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.

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

  - In QEMU through 5.0.0, an integer overflow was found in     the SM501 display driver implementation. This flaw     occurs in the COPY_AREA macro while handling MMIO write     operations through the sm501_2d_engine_write()     callback. A local attacker could abuse this flaw to     crash the QEMU process in sm501_2d_operation() in     hw/display/sm501.c on the host, resulting in a denial     of service.(CVE-2020-12829)

  - slirp.c in libslirp through 4.3.1 has a buffer     over-read because it tries to read a certain amount of     header data even if that exceeds the total packet     length.(CVE-2020-29130)

  - ncsi.c in libslirp through 4.3.1 has a buffer over-read     because it tries to read a certain amount of header     data even if that exceeds the total packet     length.(CVE-2020-29129)

  - hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop     via an RX descriptor with a NULL buffer     address.(CVE-2020-28916)

  - ati_2d_blt in hw/display/ati_2d.c in QEMU 4.2.1 can     encounter an outside-limits situation in a calculation.
    A guest can crash the QEMU process.(CVE-2020-27616)

  - eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows     guest OS users to trigger an assertion failure. A guest     can crash the QEMU process via packet data that lacks a     valid Layer 3 protocol.(CVE-2020-27617)

  - A reachable assertion issue was found in the USB EHCI     emulation code of QEMU. It could occur while processing     USB requests due to missing handling of DMA memory map     failure. A malicious privileged user within the guest     may abuse this flaw to send bogus USB requests and     crash the QEMU process on the host, resulting in a     denial of service.(CVE-2020-25723)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based     buffer over-read via values obtained from the host     controller driver.(CVE-2020-25624)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop     when a TD list has a loop.(CVE-2020-25625)

  - In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c     misuses snprintf return values, leading to a buffer     overflow in later code.(CVE-2020-8608)

  - tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in     QEMU 4.2.0, mismanages memory, as demonstrated by IRC     DCC commands in EMU_IRC. This can cause a heap-based     buffer overflow or other out-of-bounds access which can     lead to a DoS or potential execute arbitrary     code.(CVE-2020-7039)

  - ip_reass in ip_input.c in libslirp 4.0.0 has a     heap-based buffer overflow via a large packet because     it mishandles a case involving the first     fragment.(CVE-2019-14378)

  - A flaw was found in the memory management API of QEMU     during the initialization of a memory region cache.
    This issue could lead to an out-of-bounds write access     to the MSI-X table while performing MMIO operations. A     guest user may abuse this flaw to crash the QEMU     process on the host, resulting in a denial of service.
    This flaw affects QEMU versions prior to     5.2.0.(CVE-2020-27821)

  - QEMU: reachable assertion failure in     net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c     (CVE-2020-16092)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to     trigger an out-of-bounds access by providing an address     near the end of the PCI configuration     space(CVE-2020-13791)

  - qmp_guest_file_read in qga/commands-posix.c and     qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent)     in QEMU 2.12.50 has an integer overflow causing a     g_malloc0() call to trigger a segmentation fault when     trying to allocate a large memory chunk. The     vulnerability can be exploited by sending a crafted QMP     command (including guest-file-read with a large count     value) to the agent via the listening     socket.(CVE-2018-12617)

  - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an     unvalidated address, which leads to an out-of-bounds     read during sdhci_write() operations. A guest OS user     can crash the QEMU process.(CVE-2020-13253)

  - QEMU 4.1.0 has a memory leak in zrle_compress_data in     ui/vnc-enc-zrle.c during a VNC disconnect operation     because libz is misused, resulting in a situation where     memory allocated in deflateInit2 is not freed in     deflateEnd.(CVE-2019-20382)

  - An integer overflow was found in QEMU 4.0.1 through     4.2.0 in the way it implemented ATI VGA emulation. This     flaw occurs in the ati_2d_blt() routine in     hw/display/ati-2d.c while handling MMIO write     operations through the ati_mm_write() callback. A     malicious guest could abuse this flaw to crash the QEMU     process, resulting in a denial of     service.(CVE-2020-11869)

  - This vulnerability has been modified since it was last     analyzed by the NVD. It is awaiting reanalysis which     may result in further changes to the information     provided.(CVE-2020-13659)

  - A flaw was found in QEMU in the implementation of the     Pointer Authentication (PAuth) support for ARM     introduced in version 4.0 and fixed in version 5.0.0. A     general failure of the signature generation process     caused every PAuth-enforced pointer to be signed with     the same signature. A local attacker could obtain the     signature of a protected pointer and abuse this flaw to     bypass PAuth protection for all programs running on     QEMU.(CVE-2020-10702)

  - 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-2020-1586     3)

  - 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)

  - ** DISPUTED ** An issue was discovered in ide_dma_cb()     in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest     system can crash the QEMU process in the host system     via a special SCSI_IOCTL_SEND_COMMAND. It hits an     assertion that implies that the size of successful DMA     transfers there must be a multiple of 512 (the size of     a sector). NOTE: a member of the QEMU security team     disputes the significance of this issue because a     'privileged guest user has many ways to cause similar     DoS effect, without triggering this     assert.'(CVE-2019-20175)

  - 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)

  - rom_copy() in hw/core/loader.c in QEMU 4.1.0 does not     validate the relationship between two addresses, which     allows attackers to trigger an invalid memory copy     operation.(CVE-2020-13765)

  - libslirp 4.0.0, as used in QEMU 4.1.0, has a     use-after-free in ip_reass in     ip_input.c.(CVE-2019-15890)

  - A use after free vulnerability in ip_reass() in     ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of     service.(CVE-2020-1983)

  - ati-vga in hw/display/ati.c in QEMU 4.2.0 allows guest     OS users to trigger infinite recursion via a crafted     mm_index value during an ati_mm_read or ati_mm_write     call.(CVE-2020-13800)

  - An out-of-bounds heap buffer access flaw was found in     the way the iSCSI Block driver in QEMU versions 2.12.0     before 4.2.1 handled a response coming from an iSCSI     server while checking the status of a Logical Address     Block (LBA) in an iscsi_co_block_status() routine. A     remote user could use this flaw to crash the QEMU     process, resulting in a denial of service or potential     execution of arbitrary code with privileges of the QEMU     process on the host.(CVE-2020-1711)

  - tftp.c in libslirp 4.1.0, as used in QEMU 4.2.0, does     not prevent ..\ directory traversal on     Windows.(CVE-2020-7211)

  - An out-of-bounds read vulnerability was found in the     SLiRP networking implementation of the QEMU emulator.
    This flaw occurs in the icmp6_send_echoreply() routine     while replying to an ICMP echo request, also known as     ping. This flaw allows a malicious guest to leak the     contents of the host memory, resulting in possible     information disclosure. This flaw affects versions of     libslirp before 4.3.1.(CVE-2020-10756)

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 Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9034 advisory.

  - 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)

  - In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects     the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the     QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in     hw/net/net_tx_pkt.c. (CVE-2020-16092)

  - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address     in an msi-x mmio operation. (CVE-2020-13754)

  - 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)

  - hw/net/tulip.c in QEMU 4.2.0 has a buffer overflow during the copying of tx/rx buffers because the frame     size is not validated against the r/w data length. (CVE-2020-11102)

  - 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)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an     address near the end of the PCI configuration space. (CVE-2020-13791)

  - address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.
    (CVE-2020-13659)

  - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read     during sdhci_write() operations. A guest OS user can crash the QEMU process. (CVE-2020-13253)

  - A flaw was found in QEMU in the implementation of the Pointer Authentication (PAuth) support for ARM     introduced in version 4.0 and fixed in version 5.0.0. A general failure of the signature generation     process caused every PAuth-enforced pointer to be signed with the same signature. A local attacker could     obtain the signature of a protected pointer and abuse this flaw to bypass PAuth protection for all     programs running on QEMU. (CVE-2020-10702)

  - hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient PCI config space allocation, leading     to a buffer overflow involving the PCIe extended config space. (CVE-2019-15034)

  - In QEMU through 5.0.0, an integer overflow was found in the SM501 display driver implementation. This flaw     occurs in the COPY_AREA macro while handling MMIO write operations through the sm501_2d_engine_write()     callback. A local attacker could abuse this flaw to crash the QEMU process in sm501_2d_operation() in     hw/display/sm501.c on the host, resulting in a denial of service. (CVE-2020-12829)

  - oss_write in audio/ossaudio.c in QEMU before 5.0.0 mishandles a buffer position. (CVE-2020-14415)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop when a TD list has a loop. (CVE-2020-25625)

  - QEMU 5.0.0 has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not     checked. (CVE-2020-25084)

  - ati_2d_blt in hw/display/ati_2d.c in QEMU 4.2.1 can encounter an outside-limits situation in a     calculation. A guest can crash the QEMU process. (CVE-2020-27616)

  - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29129)

  - slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29130)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host     controller driver. (CVE-2020-25624)

  - hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.
    (CVE-2020-28916)

  - An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator.
    This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known     as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible     information disclosure. This flaw affects versions of libslirp before 4.3.1. (CVE-2020-10756)

  - A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while     processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user     within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,     resulting in a denial of service. (CVE-2020-25723)

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

The remote host is affected by the vulnerability described in GLSA-202011-09 (QEMU: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in QEMU. Please review the       CVE identifiers referenced below for details.
  Impact :

    Please review the referenced CVE identifiers for details.
  Workaround :

    There is no known workaround at this time.

According to the versions of the qemu-kvm packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - QEMU: reachable assertion failure in     net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c     (CVE-2020-16092)

  - An out-of-bounds read/write access flaw was found in     the USB emulator of the QEMU. 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)

  - A use after free vulnerability in ip_reass() in     ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of     service.(CVE-2020-1983)

  - 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-2020-1586     3)

  - The (1) v9fs_create and (2) v9fs_lcreate functions in     hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local     guest OS privileged users to cause a denial of service     (file descriptor or memory consumption) via vectors     related to an already in-use fid.(CVE-2017-7377)

  - QEMU 4.1.0 has a memory leak in zrle_compress_data in     ui/vnc-enc-zrle.c during a VNC disconnect operation     because libz is misused, resulting in a situation where     memory allocated in deflateInit2 is not freed in     deflateEnd.(CVE-2019-20382)

  - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an     unvalidated address, which leads to an out-of-bounds     read during sdhci_write() operations. A guest OS user     can crash the QEMU process.(CVE-2020-13253)

  - 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)

  - address_space_map in exec.c in QEMU 4.2.0 can trigger a     NULL pointer dereference related to     BounceBuffer.(CVE-2020-13659)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to     trigger an out-of-bounds access by providing an address     near the end of the PCI configuration     space.(CVE-2020-13791)

  - rom_copy() in hw/core/loader.c in QEMU 4.1.0 does not     validate the relationship between two addresses, which     allows attackers to trigger an invalid memory copy     operation.(CVE-2020-13765)

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.

According to the versions of the qemu-kvm packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - A use after free vulnerability in ip_reass() in     ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of     service.(CVE-2020-1983)

  - 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-2020-1586     3)

  - The (1) v9fs_create and (2) v9fs_lcreate functions in     hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local     guest OS privileged users to cause a denial of service     (file descriptor or memory consumption) via vectors     related to an already in-use fid.(CVE-2017-7377)

  - QEMU 4.1.0 has a memory leak in zrle_compress_data in     ui/vnc-enc-zrle.c during a VNC disconnect operation     because libz is misused, resulting in a situation where     memory allocated in deflateInit2 is not freed in     deflateEnd.(CVE-2019-20382)

  - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an     unvalidated address, which leads to an out-of-bounds     read during sdhci_write() operations. A guest OS user     can crash the QEMU process.(CVE-2020-13253)

  - 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)

  - address_space_map in exec.c in QEMU 4.2.0 can trigger a     NULL pointer dereference related to     BounceBuffer.(CVE-2020-13659)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to     trigger an out-of-bounds access by providing an address     near the end of the PCI configuration     space.(CVE-2020-13791)

  - An out-of-bounds read/write access flaw was found in     the USB emulator of the QEMU. 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)

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 version of QEMU installed on the remote Windows host is prior to release 5.1.0-rc0. It is, therefore, affected by multiple vulnerabilities:
  A denial of service flaw occurs when an nbd-client sends a spec-compliant request that is near the   boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the   qemu-nbd server resulting in a denial of service. (CVE-2020-10761)

  An out-of-bounds error occurs within hw/pci/pci.c. A guest OS user could use this flaw   by providing an address near the end of the PCI configuration space. (CVE-2020-13791)

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

  A use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e packet with   the data's address set to the e1000e's MMIO address. (CVE-2020-15859)

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
175217	EulerOS Virtualization 3.0.2.0 : qemu-kvm (EulerOS-SA-2023-1688)	Nessus	Huawei Local Security Checks	high
156489	EulerOS Virtualization 3.0.2.6 : qemu-kvm (EulerOS-SA-2021-2855)	Nessus	Huawei Local Security Checks	medium
151162	EulerOS Virtualization for ARM 64 3.0.6.0 : qemu-kvm (EulerOS-SA-2021-2011)	Nessus	Huawei Local Security Checks	medium
147700	EulerOS Virtualization 2.9.0 : qemu (EulerOS-SA-2021-1667)	Nessus	Huawei Local Security Checks	high
147523	EulerOS Virtualization 2.9.1 : qemu (EulerOS-SA-2021-1632)	Nessus	Huawei Local Security Checks	high
146269	Oracle Linux 7 : qemu (ELSA-2021-9034)	Nessus	Oracle Linux Local Security Checks	medium
142843	GLSA-202011-09 : QEMU: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	medium
140317	EulerOS Virtualization for ARM 64 3.0.2.0 : qemu-kvm (EulerOS-SA-2020-1947)	Nessus	Huawei Local Security Checks	medium
140017	EulerOS Virtualization for ARM 64 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1914)	Nessus	Huawei Local Security Checks	medium
138897	QEMU 4.2 < 5.1.0-rc0 Multiple Vulnerabilities	Nessus	Windows	medium

Detections

Analytics

CVE-2020-13791

medium

Tenable Plugins

high

medium

medium

high

high

medium

medium

medium

medium

medium