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ALSA-2020:4676 — Moderate: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update

Affected: AlmaLinux:8: hivex, AlmaLinux:8: hivex-devel, AlmaLinux:8: libguestfs-winsupport, AlmaLinux:8: libiscsi, AlmaLinux:8: libiscsi-devel, AlmaLinux:8: libiscsi-utils, AlmaLinux:8: libnbd, AlmaLinux:8: libnbd-devel, AlmaLinux:8: libvirt, AlmaLinux:8: libvirt-admin and 61 more

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.

bdu:2021-04593

EUVD-2026-42340

fkie_cve-2020-14301

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.

GHSA-5qrf-45p7-8vrc

gsd-2020-14301

RHBA-2020:3172 — Red Hat Bug Fix Advisory: Advanced Virtualization bug fix and enhancement update

QEMU: Slirp: use-after-free during packet reassembly QEMU: slirp: use-after-free in ip_reass() function in ip_input.c qemu: weak signature generation in Pointer Authentication support for ARM QEMU: virtiofsd: guest may open maximum file descriptor to cause DoS QEMU: nbd: reachable assertion failure in nbd_negotiate_send_rep_verr via remote client libvirt: leak of sensitive cookie information via dumpxml luajit: out-of-bounds read because __gc handler frame traversal is mishandled

WID-SEC-W-2023-1688 — libvirt: Schwachstelle ermöglicht Offenlegung von Informationen

Ein lokaler Angreifer kann eine Schwachstelle in libvirt ausnutzen, um Informationen offenzulegen.