// For flags

CVE-2023-6534

TCP spoofing vulnerability in pf(4)

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

En las versiones de FreeBSD 14.0-RELEASE anteriores a 14-RELEASE-p2, FreeBSD 13.2-RELEASE anteriores a 13.2-RELEASE-p7 y FreeBSD 12.4-RELEASE anteriores a 12.4-RELEASE-p9, el filtro de paquetes pf(4) valida incorrectamente los números de secuencia TCP. Esto podría permitir que un actor malintencionado ejecute un ataque de denegación de servicio contra hosts detrás del firewall.

*Credits: Yuxiang Yang, Ao Wang, Xuewei Feng, Qi Li and Ke Xu from Tsinghua University
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-12-05 CVE Reserved
  • 2023-12-13 CVE Published
  • 2023-12-20 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Freebsd
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Freebsd
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12.4
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-
Affected
Freebsd
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Freebsd
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12.4
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p1
Affected
Freebsd
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Freebsd
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12.4
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p2
Affected
Freebsd
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Freebsd
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12.4
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p3
Affected
Freebsd
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Freebsd
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12.4
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p4
Affected
Freebsd
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Freebsd
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12.4
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p5
Affected
Freebsd
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Freebsd
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12.4
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p6
Affected
Freebsd
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Freebsd
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12.4
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p7
Affected
Freebsd
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Freebsd
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12.4
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p8
Affected
Freebsd
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Freebsd
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12.4
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rc2-p1
Affected
Freebsd
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Freebsd
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12.4
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rc2-p2
Affected
Freebsd
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Freebsd
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13.2
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-
Affected
Freebsd
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Freebsd
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13.2
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p1
Affected
Freebsd
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Freebsd
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13.2
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p2
Affected
Freebsd
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Freebsd
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13.2
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p3
Affected
Freebsd
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Freebsd
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13.2
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p4
Affected
Freebsd
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Freebsd
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13.2
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p5
Affected
Freebsd
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Freebsd
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13.2
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p6
Affected
Freebsd
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Freebsd
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14.0
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-
Affected
Freebsd
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Freebsd
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14.0
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beta5
Affected
Freebsd
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Freebsd
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14.0
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p1
Affected
Freebsd
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Freebsd
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14.0
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rc3
Affected
Freebsd
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Freebsd
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14.0
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rc4-p1
Affected