CVE-2020-14339

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.

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.

Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). The main package includes the libvirtd server exporting the virtualization support.\r\n\r\n Security Fix(es):\r\n\r\n 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)\r\n\r\n

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:Rocky Linux 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 Rocky Linux 8.3 Release Notes linked from the References section.

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 AlmaLinux Release Notes linked from the References section.

This update for libvirt fixes the following issues:

• CVE-2020-14339: Don't leak /dev/mapper/control into QEMU. Use ioctl's to obtain the dependency tree of disks and drop use of libdevmapper. bsc#1161883, bsc#1174458

This update was imported from the SUSE:SLE-15-SP2:Update update project.

These are all security issues fixed in the libvirt-7.7.0-2.1 package on the GA media of openSUSE Tumbleweed.

This update for libvirt fixes the following issues:

• CVE-2020-14339: Don't leak /dev/mapper/control into QEMU. Use ioctl's to obtain the dependency tree of disks and drop use of libdevmapper. - bsc#1161883, bsc#1174458
• qemu: Setup emulator thread and cpuset.mems before exec - bsc#1171946
• libxl: Normalize MAC address in device conf on netdev hotplug - bsc#1172052

This update for libvirt fixes the following issues:

• CVE-2020-14339: Don't leak /dev/mapper/control into QEMU. Use ioctl's to obtain the dependency tree of disks and drop use of libdevmapper. - bsc#1161883, bsc#1174458
• qemu: Setup emulator thread and cpuset.mems before exec - bsc#1171946
• libxl: Normalize MAC address in device conf on netdev hotplug - bsc#1172052
• spec: Use a functional requires instead of explicit version requires for the new memory-related libxl APIs - bsc#1167007

This update for libvirt fixes the following issues:

• CVE-2020-14339: Don't leak /dev/mapper/control into QEMU. Use ioctl's to obtain the dependency tree of disks and drop use of libdevmapper. bsc#1161883, bsc#1174458