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TI-2023-05989 Aliases CVE-2023-6534GHSA-v254-5m89-3qf2

TCP spoofing vulnerability in pf(4)

Priority LOW 34Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00742 54th percentileScored 2026-11-07
Fix Fixed FreeBSD (FreeBSD): p2, p7, p9

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
FreeBSDFreeBSD14.0-RELEASE to before p2; 13.2-RELEASE to before p7; 12.4-RELEASE to before p9p2, p7, p9Patch availableCNA
  • FreeBSD VendorFreeBSD Affected 14.0-RELEASE to before p2; 13.2-RELEASE to before p7; 12.4-RELEASE to before p9 Fixed in p2, p7, p9 Patch available CNA

CPE configurations NVD · 23

CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:*12.4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:*12.4 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:*12.4 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p3:*:*:*:*:*:*12.4 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p4:*:*:*:*:*:*12.4 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p5:*:*:*:*:*:*12.4 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p6:*:*:*:*:*:*12.4 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p7:*:*:*:*:*:*12.4 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:p8:*:*:*:*:*:*12.4 p8VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:*12.4 rc2-p1VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:* Versions 12.4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:* Versions 12.4 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:* Versions 12.4 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p3:*:*:*:*:*:* Versions 12.4 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p4:*:*:*:*:*:* Versions 12.4 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p5:*:*:*:*:*:* Versions 12.4 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p6:*:*:*:*:*:* Versions 12.4 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p7:*:*:*:*:*:* Versions 12.4 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:p8:*:*:*:*:*:* Versions 12.4 p8 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:* Versions 12.4 rc2-p1 Vulnerable ·FreeBSD
Show 13 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:*12.4 rc2-p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*13.2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:*13.2 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:*13.2 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p3:*:*:*:*:*:*13.2 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p4:*:*:*:*:*:*13.2 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p5:*:*:*:*:*:*13.2 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p6:*:*:*:*:*:*13.2 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:*14.0VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:*14.0 beta5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:*14.0 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:*14.0 rc3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:*14.0 rc4-p1VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:* Versions 12.4 rc2-p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:* Versions 13.2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:* Versions 13.2 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:* Versions 13.2 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p3:*:*:*:*:*:* Versions 13.2 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p4:*:*:*:*:*:* Versions 13.2 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p5:*:*:*:*:*:* Versions 13.2 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p6:*:*:*:*:*:* Versions 13.2 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:* Versions 14.0 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:* Versions 14.0 beta5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:* Versions 14.0 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:* Versions 14.0 rc3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:* Versions 14.0 rc4-p1 Vulnerable ·FreeBSD

Remediation

  • Fix · CNA FreeBSD (FreeBSD) Fixed in p2, p7, p9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-6534
  2. 2026-10-03 Alias added: GHSA-v254-5m89-3qf2

References

Advisory 1

Other 1

  • TI-2011-04182 Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT… CVSS 2.0HIGH 10.0
  • TI-2007-03684 Integer overflow in print-bgp.c in the BGP dissector in tcpdump 3.9.6 and earlier allows… CVSS 3.1CRITICAL 9.8
  • TI-2002-00376 Integer overflow in xdr_array function in RPC servers for operating systems that use… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2003-00437 Off-by-one error in the fb_realpath() function, as derived from the realpath function in… CVSS 3.1CRITICAL 9.8
  • TI-2003-00642 The prescan function in Sendmail 8.12.9 allows remote attackers to execute arbitrary code… CVSS 2.0HIGH 10.0
See all 576 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences