The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1261 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-kvm: QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu() (CVE-2020-7039)

    * qemu-kvm: QEMU: Slirp: potential OOB access due to unsafe snprintf() usages (CVE-2020-8608)

    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.

* QEMU: Slirp: potential OOB access due to unsafe snprintf() usages

Two issues have been found in slirp, a SLIP/PPP emulator using a dial up shell account.

CVE-2020-7039

Due to mismanagement of memory, a heap-based buffer overflow or other out-of-bounds access might happen, which can lead to a DoS or potential execute arbitrary code.

CVE-2020-8608

Prevent a buffer overflow vulnerability due to incorrect usage of return values from snprintf.

For Debian 9 stretch, these problems have been fixed in version 1:1.0.17-8+deb9u1.

We recommend that you upgrade your slirp packages.

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

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.

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 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:2844 advisory.

    Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm packages provide the user-space component for running virtual machines that     use KVM.

    Security Fix(es):

    * QEMU: Slirp: potential OOB access due to unsafe snprintf() usages (CVE-2020-8608)

    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 this issue 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-2020-2774 advisory.

    - Resolves: bz#1816763       (CVE-2019-20382 virt:rhel/qemu-kvm: QEMU: vnc: memory leakage upon disconnect [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 MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2020-295:01 advisory.

    QEMU: Slirp: potential OOB access due to unsafe snprintf() usages     (CVE-2020-8608)     Bug Fix(es):
        useradd and groupadd fail under rootless Buildah and podman         Podman support for FIPS Mode requires a bind mount inside the container         Podman support for FIPS Mode requires a bind mount inside the container         fuse-overlayfs segfault         buildah COPY command is slow when .dockerignore file is not present     Modularity name: container-tools     Stream name: AXS8

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

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

The Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-2020_1379 advisory.

    * QEMU: Slirp: potential OOB access due to unsafe snprintf() usages (CVE-2020-8608)

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

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

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.

This update for qemu fixes the following issues :

Fix out-of-bounds access issue while doing multi block SDMA (CVE-2020-25085, bsc#1176681)

Fix out-of-bounds read information disclosure in icmp6_send_echoreply (CVE-2020-10756, bsc#1172380)

QEMU BIOS fails to read stage2 loader on s390x (bsc#1186290)

Change dependency from CONFIG_VFIO back to CONFIG_LINUX (bsc#1179725)

For the record, these issues are fixed in this package already. Most are alternate references to previously mentioned issues:
(CVE-2019-15890, bsc#1149813, CVE-2020-8608, bsc#1163019, CVE-2020-14364, bsc#1175534, CVE-2020-25707, bsc#1178683, CVE-2020-25723, bsc#1178935, CVE-2020-29130, bsc#1179477, CVE-2020-29129, bsc#1179484, CVE-2021-20257, bsc#1182846, CVE-2021-3419, bsc#1182975)

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 SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1894-1 advisory.

    - Fix OOB access during mmio operations (CVE-2020-13754, bsc#1172382)
    - Fix out-of-bounds read information disclosure in icmp6_send_echoreply (CVE-2020-10756, bsc#1172380)
    - Fix out-of-bound heap buffer access via an interrupt ID field (CVE-2021-20221, bsc#1181933)
    - For the record, these issues are fixed in this package already.
      Most are alternate references to previously mentioned issues:
      (CVE-2019-15890, bsc#1149813, CVE-2020-8608, bsc#1163019,       CVE-2020-14364, bsc#1175534, CVE-2020-25707, bsc#1178683,       CVE-2020-25723, bsc#1178935, CVE-2020-29130, bsc#1179477,       CVE-2021-20257, bsc#1182846, CVE-2021-3419, bsc#1182975,       bsc#1094725)

Tenable has extracted the preceding description block directly from the SUSE 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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)

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0110 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2019-5736:
    runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows attackers to overwrite     the host runc binary (and consequently obtain host root access) by leveraging the ability to execute a     command as root within one of these types of containers: (1) a new container with an attacker-controlled     image, or (2) an existing container, to which the attacker previously had write access, that can be     attached with docker exec. This occurs because of file-descriptor mishandling, related to /proc/self/exe.

    CVE-2019-9514:
    Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service.
    The attacker opens a number of streams and sends an invalid request over each stream that should solicit a     stream of RST_STREAM frames from the peer. Depending on how the peer queues the RST_STREAM frames, this     can consume excess memory, CPU, or both.

    CVE-2019-14378:
    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-2019-16884:
    runc through 1.0.0-rc8, as used in Docker through 19.03.2-ce and other products, allows AppArmor     restriction bypass because libcontainer/rootfs_linux.go incorrectly checks mount targets, and thus a     malicious Docker image can mount over a /proc directory.

    CVE-2019-19921:
    runc through 1.0.0-rc9 has Incorrect Access Control leading to Escalation of Privileges, related to     libcontainer/rootfs_linux.go. To exploit this, an attacker must be able to spawn two containers with     custom volume-mount configurations, and be able to run custom images. (This vulnerability does not affect     Docker due to an implementation detail that happens to block the attack.)

    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-2020-7039:
    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-2020-8608:
    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-2021-3595:
    An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0.

    CVE-2021-20188:
    A flaw was found in podman before 1.7.0. File permissions for non-root users running in a privileged     container are not correctly checked. This flaw can be abused by a low-privileged user inside the container     to access any other file in the container, even if owned by the root user inside the container. It does     not allow to directly escape the container, though being a privileged container means that a lot of     security features are disabled when running the container. The highest threat from this vulnerability is     to data confidentiality and integrity as well as system availability.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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 Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2022:0110 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2019-5736:
    runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows attackers to overwrite     the host runc binary (and consequently obtain host root access) by leveraging the abilityto execute a     command as root within one of these types of containers: (1) a new container with an attacker-controlled     image, or (2) an existing container, to which the attacker previously had write access, that can be     attached with docker exec. This occurs because of file-descriptor mishandling, related to /proc/self/exe.

    CVE-2019-9514:
    Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service.
    The attacker opens a number of streams and sends an invalid request over each stream that should solicit a     stream of RST_STREAM frames from the peer. Depending on how the peer queues the RST_STREAM frames, this     can consume excess memory, CPU, or both.

    CVE-2019-14378:
    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-2019-16884:
    runc through 1.0.0-rc8, as used in Docker through 19.03.2-ce and other products, allows AppArmor     restriction bypass because libcontainer/rootfs_linux.go incorrectly checks mount targets, and thus a     malicious Docker image can mount over a /proc directory.

    CVE-2019-19921:
    runc through 1.0.0-rc9 has Incorrect Access Control leading to Escalation of Privileges, related to     libcontainer/rootfs_linux.go. To exploit this, an attacker must be able to spawn two containers with     custom volume-mount configurations, and be able to run custom images. (This vulnerability does not affect     Docker due to an implementation detail that happens to block the attack.)

    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-2020-7039:
    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-2020-8608:
    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 before4.3.1.

    CVE-2021-3595:
    An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability isto data confidentiality. This flaw     affects libslirp versions prior to 4.6.0.

    CVE-2021-20188:
    A flaw was found in podman before 1.7.0. File permissions for non-root users running in a privileged     container are not correctly checked. This flaw can be abused by a low-privileged user inside the container     to access any other file in the container, even if owned by the root user inside the container. It does     not allow to directly escape the container, though being a privileged container means that a lot of     security features are disabled when running the container. The highest threat from this vulnerability is     to data confidentiality and integrity as well as system availability.

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 remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7094-1 advisory.

    It was discovered that QEMU incorrectly handled memory during certain VNC operations. A remote attacker     could possibly use this issue to cause QEMU to consume resources, resulting in a denial of service. This     issue only affected Ubuntu 14.04 LTS. (CVE-2019-20382)

    It was discovered that QEMU incorrectly handled certain memory copy operations when loading ROM contents.
    If a user were tricked into running an untrusted kernel image, a remote attacker could possibly use this     issue to run arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-13765)

    Aviv Sasson discovered that QEMU incorrectly handled Slirp networking. A remote attacker could use this     issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This     issue only affected Ubuntu 14.04 LTS. (CVE-2020-1983)

    It was discovered that the SLiRP networking implementation of the QEMU emulator did not properly manage     memory under certain circumstances. An attacker could use this to cause a heap-based buffer overflow or     other out- of-bounds access, which can lead to a denial of service (application crash) or potential     execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-7039)

    It was discovered that the SLiRP networking implementation of the QEMU emulator misuses snprintf return     values. An attacker could use this to cause a denial of service (application crash) or potentially execute     arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-8608)

    It was discovered that QEMU SLiRP networking incorrectly handled certain udp packets. An attacker inside a     guest could possibly use this issue to leak sensitive information from the host. This issue only affected     Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2021-3592, CVE-2021-3594)

    It was discovered that QEMU had a DMA reentrancy issue, leading to a use-after-free vulnerability. An     attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04     LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-3019)

    It was discovered that QEMU had a flaw in Virtio PCI Bindings, leading to a triggerable crash via     vhost_net_stop. An attacker inside a guest could possibly use this issue to cause a denial of service.
    This issue only affected Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-4693)

    It was discovered that QEMU incorrectly handled memory in virtio-sound, leading to a heap-based buffer     overflow. An attacker could possibly use this issue to cause a denial of service or execute arbitrary     code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-7730)

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.

ID	名稱	產品	系列	已發布	已更新	嚴重性
170306	RHEL 8 : virt:8.1 (RHSA-2020:1261)	Nessus	Red Hat Local Security Checks	2023/1/23	2024/11/7	medium
135833	Scientific Linux Security Update : qemu-kvm on SL7.x x86_64 (20200407)	Nessus	Scientific Linux Local Security Checks	2020/4/21	2020/9/29	medium
146372	Debian DLA-2551-1 : slirp security update	Nessus	Debian Local Security Checks	2021/2/10	2024/1/22	medium
137577	SUSE SLES12 Security Update : qemu (SUSE-SU-2020:1514-1)	Nessus	SuSE Local Security Checks	2020/6/18	2024/3/6	high
138173	RHEL 7 : qemu-kvm (RHSA-2020:2844)	Nessus	Red Hat Local Security Checks	2020/7/7	2024/11/7	medium
138202	Oracle Linux 8 : virt:ol (ELSA-2020-2774)	Nessus	Oracle Linux Local Security Checks	2020/8/13	2024/11/1	medium
293801	MiracleLinux 8 : container-tools: rhel8 (AXSA:2020-295:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium
359193	Rocky Linux 8 [CIQ] Security Update: cockpit-podman / container-selinux / containernetworking-plugins / etc (crlsa-2020_1379)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	medium
191255	CentOS 9 : qemu-kvm-6.1.0-3.el9	Nessus	CentOS Local Security Checks	2024/2/29	2024/4/26	high
150220	SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1837-1)	Nessus	SuSE Local Security Checks	2021/6/3	2023/12/27	medium
150399	SUSE SLES12: qemu / qemu-arm / qemu-block-curl / qemu-block-iscsi / etc (SUSE-SU-2021:1894-1)	Nessus	SuSE Local Security Checks	2021/6/9	2026/6/25	medium
223615	Linux Distros Unpatched Vulnerability : CVE-2020-8608	Nessus	Misc.	2025/3/4	2026/10/29	medium
236506	Alibaba Cloud Linux 3 : 0110: container-tools:rhel8 (ALINUX3-SA-2022:0110)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/15	high
276379	TencentOS Server 3: container-tools:rhel8 (TSSA-2022:0110)	Nessus	Tencent Local Security Checks	2025/11/20	2026/3/10	high
210736	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : QEMU vulnerabilities (USN-7094-1)	Nessus	Ubuntu Local Security Checks	2024/11/11	2026/1/21	high

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