USN-7094-1: QEMU vulnerabilities

8 November 2024

Several security issues were fixed in QEMU.

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Releases

Packages

  • qemu - Machine emulator and virtualizer

Details

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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 24.10
Ubuntu 24.04
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

Related notices

  • USN-4283-1: qemu-utils, qemu-system-data, qemu-system-common, qemu, qemu-user, qemu-system-ppc, qemu-system-x86, qemu-system-gui, qemu-system-misc, qemu-kvm, qemu-system-sparc, qemu-system-arm, qemu-system, qemu-system-mips, qemu-system-aarch64, qemu-guest-agent, qemu-system-s390x, qemu-block-extra, qemu-user-static, qemu-user-binfmt
  • USN-4632-1: slirp
  • USN-4372-1: qemu-system-x86-xen, qemu-utils, qemu-system-data, qemu-system-common, qemu, qemu-user, qemu-system-ppc, qemu-system-x86, qemu-system-gui, qemu-system-misc, qemu-kvm, qemu-system-sparc, qemu-system-arm, qemu-system, qemu-system-mips, qemu-system-aarch64, qemu-guest-agent, qemu-system-s390x, qemu-block-extra, qemu-user-static, qemu-system-x86-microvm, qemu-user-binfmt
  • USN-5009-1: libslirp-dev, libslirp, libslirp0
  • USN-5010-1: qemu-system-x86-xen, qemu-utils, qemu-system-data, qemu-system-common, qemu, qemu-user, qemu-system-ppc, qemu-system-x86, qemu-system-gui, qemu-system-misc, qemu-kvm, qemu-system-sparc, qemu-system-arm, qemu-system, qemu-system-mips, qemu-guest-agent, qemu-system-s390x, qemu-block-extra, qemu-user-static, qemu-system-x86-microvm, qemu-user-binfmt
  • USN-5009-2: libslirp-dev, libslirp, libslirp0
  • USN-4467-1: qemu-system-x86-xen, qemu-utils, qemu-system-data, qemu-system-common, qemu, qemu-user, qemu-system-ppc, qemu-system-x86, qemu-system-gui, qemu-system-misc, qemu-kvm, qemu-system-sparc, qemu-system-arm, qemu-system, qemu-system-mips, qemu-system-aarch64, qemu-guest-agent, qemu-system-s390x, qemu-block-extra, qemu-user-static, qemu-system-x86-microvm, qemu-user-binfmt