The following CVE(s) were reported against src:qemu :

CVE-2017-9503

QEMU (aka Quick Emulator), when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allows local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash) via vectors involving megasas command processing.

CVE-2019-12068

In QEMU 1:4.1-1 (1:2.8+dfsg-6+deb9u8), when executing script in lsi_execute_script(), the LSI scsi adapter emulator advances 's->dsp' index to read next opcode. This can lead to an infinite loop if the next opcode is empty. Move the existing loop exit after 10k iterations so that it covers no-op opcodes as well.

CVE-2019-20382

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-2020-1983

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-2020-8608

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-2020-10756

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-2020-13361

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-2020-13362

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-2020-13659

address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.

CVE-2020-13754

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-2020-13765

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-2020-15863

Stack-based overflow in xgmac_enet_send() in hw/net/xgmac.c.

For Debian 9 stretch, these problems have been fixed in version 1:2.8+dfsg-6+deb9u10.

We recommend that you upgrade your qemu packages.

For the detailed security status of qemu please refer to its security tracker page at: https://security-tracker.debian.org/tracker/qemu

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

The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the qemu-kvm-6.1.0-3.el9 build changelog.

  - use-after-free during packet reassembly [rhel-av-8]) (CVE-2019-15890)

  - 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)

  - A potential DoS flaw was found in the virtio-fs shared file system daemon (virtiofsd) implementation of     the QEMU version >= v5.0. Virtio-fs is meant to share a host file system directory with a guest via     virtio-fs device. If the guest opens the maximum number of file descriptors under the shared directory, a     denial of service may occur. This flaw allows a guest user/process to cause this denial of service on the     host. (CVE-2020-10717)

  - 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)

  - An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before     QEMU 5.0.1. This 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)

  - out-of-bounds r/w access issue while processing usb packets [rhel-av-8.3.0]) (CVE-2020-14364)

  - OOB heap access via an unexpected response of iSCSI Server [rhel-av-8.2.0]) (CVE-2020-1711)

  - 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)

  - 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)

  - A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system     daemon where a privileged guest user is able to create a device special file in the shared directory and     use it to r/w access host devices. (CVE-2020-35517)

  - OOB buffer access while emulating tcp protocols in tcp_emu() [rhel-av-8.2.0]) (CVE-2020-7039)

  - potential OOB access due to unsafe snprintf() usages [rhel-av-8.2.0]) (CVE-2020-8608)

  - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of     QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an     interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said     issue while updating controller state fields and their subsequent processing. A privileged guest user may     use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)

  - A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option     may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a     modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a     malicious user to elevate their privileges within the guest. (CVE-2021-20263)

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-2020-4079 advisory.

  - 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)

  - 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)

Note that Nessus has not tested for this issue 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-2020:4290 advisory.

    The Advanced Virtualization module provides the user-space component for running virtual machines that use     KVM in environments managed by Red Hat products.

    Security Fix(es):

    * QEMU: usb: out-of-bounds r/w access issue while processing usb packets (CVE-2020-14364)

    * QEMU: slirp: use-after-free in ip_reass() function in ip_input.c (CVE-2020-1983)

    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.

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.

This update for qemu fixes the following issues :

Security issue fixed :

  - CVE-2020-1983: Fixed a use-after-free in the ip_reass     function of slirp (bsc#1170940).

Non-security issues fixed :

  - Fixed an issue where limiting the memory bandwidth was     not possible (bsc#1167816).

  - Fixed the issue that s390x could not read IPL channel     program when using dasd as boot device (bsc#1158880).

  - Miscellaneous fixes to the in-package support     documentation.

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Multiple security issues were discovered in QEMU, a fast processor emulator, which could result in denial of service or the execution of arbitrary code.

This update for qemu fixes the following issues :

Security issues fixed :

CVE-2020-1983: Fixed a use-after-free in the ip_reass function of slirp (bsc#1170940).

CVE-2019-20382: Fixed a potential DoS due to a memory leak in VNC disconnect (bsc#1165776).

CVE-2020-1711: Fixed a potential OOB access in the iSCSI client code (bsc#1166240).

CVE-2020-8608: Fixed a potential OOB access in slirp (bsc#1163018).

CVE-2020-7039: Fixed a potential OOB access in slirp (bsc#1161066).

Fixed multiple potential DoS issues in SLIRP, similar to CVE-2019-6778 (bsc#1123156).

Non-security issue fixed :

Miscellaneous fixes to the in-package support documentation.

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

This update for qemu fixes the following issues :

Security issues fixed :

CVE-2020-1711: Fixed a potential OOB access in the iSCSI client code (bsc#1166240).

CVE-2019-12068: Fixed a potential DoS in the LSI SCSI controller emulation (bsc#1146873).

CVE-2020-1983: Fixed a use-after-free in the ip_reass function of slirp (bsc#1170940).

CVE-2020-8608: Fixed a potential OOB access in slirp (bsc#1163018).

CVE-2020-7039: Fixed a potential OOB access in slirp (bsc#1161066).

CVE-2019-15890: Fixed a use-after-free during packet reassembly in slirp (bsc#1149811).

Fixed multiple potential DoS issues in SLIRP, similar to CVE-2019-6778 (bsc#1123156).

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4676 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.

    The following packages have been upgraded to a later upstream version: hivex (1.3.18), libguestfs     (1.40.2), libguestfs-winsupport (8.2), libvirt (6.0.0), libvirt-dbus (1.3.0), libvirt-python (6.0.0),     nbdkit (1.16.2), perl-Sys-Virt (6.0.0), qemu-kvm (4.2.0), seabios (1.13.0), SLOF (20191022). (BZ#1810193,     BZ#1844296)

    Security Fix(es):

    * libvirt: leak of /dev/mapper/control into QEMU guests (CVE-2020-14339)

    * QEMU: Slirp: use-after-free during packet reassembly (CVE-2019-15890)

    * libvirt: Potential DoS by holding a monitor job while querying QEMU guest-agent (CVE-2019-20485)

    * QEMU: slirp: use-after-free in ip_reass() function in ip_input.c (CVE-2020-1983)

    * libvirt: Potential denial of service via active pool without target path (CVE-2020-10703)

    * libvirt: leak of sensitive cookie information via dumpxml (CVE-2020-14301)

    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 8.3 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 Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2020:4676 advisory.

  - 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)

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage). (CVE-2019-20485)

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

  - An information disclosure vulnerability was found in libvirt in versions before 6.3.0. HTTP cookies used     to access network-based disks were saved in the XML dump of the guest domain. This flaw allows an attacker     to access potentially sensitive information in the domain configuration via the `dumpxml` command.
    (CVE-2020-14301)

  - A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or process to perform operations outside of their standard     permissions, potentially causing serious damage to the host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2020-14339)

  - 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)

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 7 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: net: buffer overflow in MIPSnet emulator (CVE-2016-4002)

  - Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of     service (process crash) via a CLIENT_CUT_TEXT message, which triggers an infinite loop. (CVE-2015-5239)

  - The ne2000_receive function in hw/net/ne2000.c in QEMU before 2.4.0.1 allows attackers to cause a denial     of service (infinite loop and instance crash) or possibly execute arbitrary code via vectors related to     receiving packets. (CVE-2015-5278)

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 version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2020-1449 advisory.

  - qemu-seccomp.c in QEMU might allow local OS guest users to cause a denial of service (guest crash) by     leveraging mishandling of the seccomp policy for threads other than the main thread. (CVE-2018-15746)

  - 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)

  - 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)

  - 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)

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

ID	Name	Product	Family	Published	Updated	Severity
138911	Debian DLA-2288-1 : qemu security update	Nessus	Debian Local Security Checks	7/27/2020	2/28/2024	medium
191255	CentOS 9 : qemu-kvm-6.1.0-3.el9	Nessus	CentOS Local Security Checks	2/29/2024	4/26/2024	high
141313	Oracle Linux 7 : qemu-kvm (ELSA-2020-4079)	Nessus	Oracle Linux Local Security Checks	10/8/2020	2/16/2024	medium
141627	RHEL 8 : virt:8.1 and virt-devel:8.1 (RHSA-2020:4290)	Nessus	Red Hat Local Security Checks	10/20/2020	6/4/2024	medium
137131	openSUSE Security Update : qemu (openSUSE-2020-756)	Nessus	SuSE Local Security Checks	6/4/2020	3/7/2024	medium
136069	Debian DSA-4665-1 : qemu - security update	Nessus	Debian Local Security Checks	4/29/2020	3/14/2024	medium
137549	SUSE SLES12 Security Update : qemu (SUSE-SU-2020:1501-1)	Nessus	SuSE Local Security Checks	6/17/2020	3/6/2024	high
137581	SUSE SLES12 Security Update : qemu (SUSE-SU-2020:1526-1)	Nessus	SuSE Local Security Checks	6/18/2020	3/6/2024	high
142449	RHEL 8 : virt:rhel and virt-devel:rhel (RHSA-2020:4676)	Nessus	Red Hat Local Security Checks	11/4/2020	6/4/2024	high
184870	Rocky Linux 8 : virt:rhel and virt-devel:rhel (RLSA-2020:4676)	Nessus	Rocky Linux Local Security Checks	11/7/2023	11/7/2023	high
200007	RHEL 7 : kvm (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	6/3/2024	6/3/2024	critical
142974	Amazon Linux AMI : qemu-img (ALAS-2020-1449)	Nessus	Amazon Linux Local Security Checks	11/18/2020	11/19/2020	high

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