VulnerabilityModified

CVE-2023-6534

This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall.

HIGH 7.5EPSS 0.74%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

In versions of FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7 and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, the pf(4) packet filter incorrectly validates TCP sequence numbers. This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.74% probability · 53th percentile
CISA KEV: Not listed
Affected: freebsd/freebsd
Source: secteam@freebsd.org

References

https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20240112-0007/
https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20240112-0007/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.