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CVE-2023-6534— TCP spoofing vulnerability in pf(4)

Quick assessment

Affected
FreeBSD FreeBSD
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在安全漏洞，该漏洞源于pf（4）数据包筛选器没有正确验证TCP序列号，导致存在拒绝服务（DOS）漏洞。受影响的产品和版本：FreeBSD 14-RELEASE-p2之前的14.0-RELEASE版本，13.2-RELEASE-p7之前的13.2-RELEASE版本，12.4-RELEASE-p9之前的FreeBSD 12.4-RELEASE版本。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.74% · P53

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-6534

Vulnerability Information
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Vulnerability Title
TCP spoofing vulnerability in pf(4)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
FreeBSD 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在安全漏洞，该漏洞源于pf（4）数据包筛选器没有正确验证TCP序列号，导致存在拒绝服务（DOS）漏洞。受影响的产品和版本：FreeBSD 14-RELEASE-p2之前的14.0-RELEASE版本，13.2-RELEASE-p7之前的13.2-RELEASE版本，12.4-RELEASE-p9之前的FreeBSD 12.4-RELEASE版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeBSD FreeBSD 14.0-RELEASE ~ p2 -

II. Public POCs for CVE-2023-6534

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III. Intelligence Information for CVE-2023-6534

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Vendor Advisories for CVE-2023-6534 (1)

Other References for CVE-2023-6534 (1)

IV. Related Vulnerabilities

Same product: FreeBSD
Same vendor: FreeBSD

V. Comments for CVE-2023-6534

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