Is CVE-2023-3019 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2023-3019 being exploited in the wild.

How severe is CVE-2023-3019?

Medium severity, with a CVSS score of 6, published 24 July 2023.

Which products and versions are affected?

QEMU Project QEMU up to (excluding) 8.2.0; Red Hat Enterprise Linux 8, 9.

Is there a fix for CVE-2023-3019?

A patch was published on 2024-01-10: Red Hat released security updates for RHEL 8 (RHSA-2024:0135) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2023-3019 attacked?

It is attacked with local access, in an operating system.

Am I affected by CVE-2023-3019?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2023-3019: QEMU use-after-free in e1000e NIC emulation

CVE-2023-3019 · Severity: medium · CVSS 6 · Published 2023-07-24

A vulnerability was found in QEMU, a widely used virtualization tool that allows computers to run multiple operating systems simultaneously. A user with administrative privileges within a virtual machine could exploit a flaw in the simulated network hardware to crash the host system. This results in a denial of service, potentially disrupting all other virtual machines and services running on that same physical server.

Quick answers

Is CVE-2023-3019 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2023-3019 being exploited in the wild.
How severe is CVE-2023-3019?: Medium severity, with a CVSS score of 6, published 24 July 2023.
Which products and versions are affected?: QEMU Project QEMU up to (excluding) 8.2.0; Red Hat Enterprise Linux 8, 9.
Is there a fix for CVE-2023-3019?: A patch was published on 2024-01-10: Red Hat released security updates for RHEL 8 (RHSA-2024:0135) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2023-3019 attacked?: It is attacked with local access, in an operating system.
Am I affected by CVE-2023-3019?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free vulnerability exists in QEMU's e1000e network interface card (NIC) emulation, specifically within the e1000e_write_packet_to_guest() function. The flaw is triggered by a DMA reentrancy issue where nested I/O operations can lead to the premature freeing of memory buffers that are still in use. A privileged attacker within a guest virtual machine can trigger this condition to cause a heap use-after-free, resulting in the crash of the QEMU process on the host (Denial of Service). The issue is addressed in QEMU version 8.2.0 and various vendor-specific patches from Red Hat and Debian.

Affected products

QEMU Project QEMU up to (excluding) 8.2.0
Red Hat Enterprise Linux 8, 9

Timeline

2023-07-24: disclosed: Initial NVD publication
2024-01-10: patched: Red Hat released security updates for RHEL 8 (RHSA-2024:0135)
2024-01-24: patched: Red Hat released security updates for RHEL 8.6 EUS (RHSA-2024:0404)

References

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