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CVE-2023-52558— OpenBSD 7.4 and 7.3 m_split() network buffer kernel crash

Quick assessment

Affected
OpenBSD OpenBSD
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.

OpenBSD是加拿大OpenBSD项目组的一套跨平台的、基于BSD的类UNIX操作系统。 OpenBSD 7.4 errata 002之前、OpenBSD 7.3 errata 019之前版本存在安全漏洞，该漏洞源于在接收到特制的转义序列后导致内核崩溃。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.70% · P51

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2023-52558

Vulnerability Information
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Vulnerability Title
OpenBSD 7.4 and 7.3 m_split() network buffer kernel crash
Source: CVE Program / CVE List V5
Vulnerability Description
In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenBSD 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenBSD是加拿大OpenBSD项目组的一套跨平台的、基于BSD的类UNIX操作系统。 OpenBSD 7.4 errata 002之前、OpenBSD 7.3 errata 019之前版本存在安全漏洞，该漏洞源于在接收到特制的转义序列后导致内核崩溃。
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
OpenBSD OpenBSD 7.3 ~ 7.3 errata 019 -

II. Public POCs for CVE-2023-52558

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III. Intelligence Information for CVE-2023-52558

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Patches & Fixes for CVE-2023-52558 (1)

Other References for CVE-2023-52558 (2)

Same Patch Batch · OpenBSD · 2024-03-01 · 3 CVEs total

CVE-2023-52556 OpenBSD 7.4 pf state race condition kernel crash
CVE-2023-52557 OpenBSD 7.3 invalid l2tp message npppd crash

IV. Related Vulnerabilities

Same product: OpenBSD
Same vendor: OpenBSD
Same weakness: CWE-131

V. Comments for CVE-2023-52558

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