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CVE-2022-31627— Heap buffer overflow in finfo_buffer

Quick assessment

Affected
PHP Group PHP
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.

PHP是一种在服务器端执行的脚本语言。 PHP 8.1.x系列8.1.8 之前的版本存在安全漏洞，该漏洞源于可以通过 finfo_buffer 触发 PHP 的缓冲区溢出，攻击者利用该漏洞可以触发拒绝服务，并可能运行代码。

CVSS 7.7 · High EPSS 2.08% · P81

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2022-31627

Vulnerability Information
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Vulnerability Title
Heap buffer overflow in finfo_buffer
Source: CVE Program / CVE List V5
Vulnerability Description
In PHP versions 8.1.x below 8.1.8, when fileinfo functions, such as finfo_buffer, due to incorrect patch applied to the third party code from libmagic, incorrect function may be used to free allocated memory, which may lead to heap corruption.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
释放并不在堆上的内存
Source: CVE Program / CVE List V5
Vulnerability Title
PHP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PHP是一种在服务器端执行的脚本语言。 PHP 8.1.x系列8.1.8 之前的版本存在安全漏洞，该漏洞源于可以通过 finfo_buffer 触发 PHP 的缓冲区溢出，攻击者利用该漏洞可以触发拒绝服务，并可能运行代码。
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
PHP Group PHP 8.1.X ~ 8.1.8 -

II. Public POCs for CVE-2022-31627

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III. Intelligence Information for CVE-2022-31627

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Vendor Advisories for CVE-2022-31627 (2)

Other References for CVE-2022-31627 (1)

IV. Related Vulnerabilities

Same product: PHP
Same vendor: PHP Group
Same weakness: CWE-590

V. Comments for CVE-2022-31627

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