What is CVE-2019-5609?

CVE-2019-5609 is a high-severity vulnerability in Freebsd, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2019-08-30.

How severe is CVE-2019-5609?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Freebsd

CVE-2019-5609

In FreeBSD 12.0-STABLE before r350619, 12.0-RELEASE before 12.0-RELEASE-p9, 11.3-STABLE before r350619, 11.3-RELEASE before 11.3-RELEASE-p2, and 11.2-RELEASE before 11.2-RELEASE-p13, the bhyve e1000 device emulation used a guest-provided value to determine the size of the on-stack buffer without validation when TCP segmentation offload is requested for a transmitted packet. A misbehaving bhyve guest could overwrite memory in the bhyve process on the host.

Vulnerability class: Buffer Overflow

EPSS: 0.013 (67.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Freebsd — versions 11.2, 11.3, 12.0
N/a Freebsd — versions before 12.0-RELEASE-p9, before 11.3-RELEASE-p2, and before 11.2-RELEASE-p13

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

secteam@freebsd.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
secteam@freebsd.org (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2019-5609?: CVE-2019-5609 is a high-severity vulnerability in Freebsd, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2019-08-30.
How severe is CVE-2019-5609?: High severity. CVSS v3 base score is 7.5 out of 10.