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.

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 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 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. (CVE-2021-20188)

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 remote CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:0681 advisory.

  - 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. (CVE-2021-20188)

Note that Nessus has not tested for this issue 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 a vulnerability as referenced in the RLSA-2021:0705 advisory.

  - 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. (CVE-2021-20188)

Note that Nessus has not tested for this issue 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 a vulnerability as referenced in the RLSA-2021:0706 advisory.

  - 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. (CVE-2021-20188)

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 a vulnerability as referenced in the ELSA-2021-0706 advisory.

    - fix 'CVE-2020-10696 buildah: crafted input tar file may lead to local file overwriting during image     build process'
    - fix CVE-2020-1702
    - Fix CVE-2019-10214 (#1734653).
    - fix CVE-2021-20188
    - Fix CVE-2020-1702.
    - Fix CVE-2019-10214 (#1734651).

Tenable has extracted the preceding description block directly from the Oracle 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 a vulnerability as referenced in the ELSA-2021-0705 advisory.

    - fix 'CVE-2020-10696 buildah: crafted input tar file may lead to local file overwriting during image     build process'
    - rebuild because of CVE-2019-9512 and CVE-2019-9514
    - fix 'podman can not create user inside of container' regression introduced by       patch for CVE-2021-20188
    - fix CVE-2021-20188
    - fix 'CVE-2020-10696 buildah: crafted input tar file may lead to local file overwriting during image     build process'
    - rebuild because of CVE-2019-9512 and CVE-2019-9514
    - rebuild because of CVE-2019-9512 and CVE-2019-9514
    - Resolves: CVE-2019-5736
    - Resolves: #1412239 - *CVE-2016-9962* - set init processes as non-dumpable,     runc patch from Michael Crosby <crosbymichael@gmail.com>
    - rebuild because of CVE-2019-9512 and CVE-2019-9514
    - backport fix for CVE-2020-7039
    - actually add CVE-2019-14378 patch to dist-git
    - Fix CVE-2019-14378 (#1768394).

Tenable has extracted the preceding description block directly from the Oracle 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 Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:0710 advisory.

    The container-tools module contains tools for working with containers, notably podman, buildah, skopeo,     and runc.

    Security Fix(es):

    * podman: container users permissions are not respected in privileged containers (CVE-2021-20188)

    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 CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2021:0705 advisory.

  - podman: container users permissions are not respected in privileged containers (CVE-2021-20188)

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 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2021:0706 advisory.

  - podman: container users permissions are not respected in privileged containers (CVE-2021-20188)

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 a vulnerability as referenced in the RHSA-2021:0705 advisory.

    The container-tools module contains tools for working with containers, notably podman, buildah, skopeo,     and runc.

    Security Fix(es):

    * podman: container users permissions are not respected in privileged containers (CVE-2021-20188)

    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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0706 advisory.

    The container-tools module contains tools for working with containers, notably podman, buildah, skopeo,     and runc.

    Security Fix(es):

    * podman: container users permissions are not respected in privileged containers (CVE-2021-20188)

    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.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:0681 advisory.

    The podman tool manages pods, container images, and containers. It is part of the libpod library, which is     for applications that use container pods. Container pods is a concept in Kubernetes.

    Security Fix(es):

    * podman: container users permissions are not respected in privileged containers (CVE-2021-20188)

    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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3053 advisory.

    The container-tools module contains tools for working with containers, notably podman, buildah, skopeo,     and runc.

    Security Fix(es):

    * 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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.2 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.

ID	Name	Product	Family	Severity
276379	TencentOS Server 3: container-tools:rhel8 (TSSA-2022:0110)	Nessus	Tencent Local Security Checks	high
251645	Linux Distros Unpatched Vulnerability : CVE-2021-20188	Nessus	Misc.	high
236506	Alibaba Cloud Linux 3 : 0110: container-tools:rhel8 (ALINUX3-SA-2022:0110)	Nessus	Alibaba Cloud Linux Local Security Checks	high
208506	CentOS 7 : podman (RHSA-2021:0681)	Nessus	CentOS Local Security Checks	high
184732	Rocky Linux 8 : container-tools:1.0 (RLSA-2021:0705)	Nessus	Rocky Linux Local Security Checks	high
184724	Rocky Linux 8 : container-tools:2.0 (RLSA-2021:0706)	Nessus	Rocky Linux Local Security Checks	high
147170	Oracle Linux 8 : container-tools:2.0 (ELSA-2021-0706)	Nessus	Oracle Linux Local Security Checks	high
147166	Oracle Linux 8 : container-tools:1.0 (ELSA-2021-0705)	Nessus	Oracle Linux Local Security Checks	high
147009	RHEL 8 : container-tools:2.0 (RHSA-2021:0710)	Nessus	Red Hat Local Security Checks	high
146964	CentOS 8 : container-tools:1.0 (CESA-2021:0705)	Nessus	CentOS Local Security Checks	high
146963	CentOS 8 : container-tools:2.0 (CESA-2021:0706)	Nessus	CentOS Local Security Checks	high
146956	RHEL 8 : container-tools:1.0 (RHSA-2021:0705)	Nessus	Red Hat Local Security Checks	high
146950	RHEL 8 : container-tools:2.0 (RHSA-2021:0706)	Nessus	Red Hat Local Security Checks	high
146932	RHEL 7 : podman (RHSA-2021:0681)	Nessus	Red Hat Local Security Checks	high
138804	RHEL 8 : container-tools:rhel8 (RHSA-2020:3053)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2021-20188

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high