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CVE-2020-7060— global buffer-overflow in mbfl_filt_conv_big5_wchar

Quick assessment

Affected
PHP Group PHP
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PHP（PHP：Hypertext Preprocessor，PHP：超文本预处理器）是PHPGroup和开放源代码社区的共同维护的一种开源的通用计算机脚本语言。该语言主要用于Web开发，支持多种数据库及操作系统。 PHP 7.2.27之前的7.2.x版本、7.3.14之前的7.3.x版本和7.4.2之前的7.4.x版本中存在缓冲区错误漏洞。攻击者可利用该漏洞获取信息或造成应用程序崩溃。

CVSS 6.5 · Medium EPSS 8.89% · P95
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I. Basic Information for CVE-2020-7060

Vulnerability Information
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Vulnerability Title
global buffer-overflow in mbfl_filt_conv_big5_wchar
Source: CVE Program / CVE List V5
Vulnerability Description
When using certain mbstring functions to convert multibyte encodings, in PHP versions 7.2.x below 7.2.27, 7.3.x below 7.3.14 and 7.4.x below 7.4.2 it is possible to supply data that will cause function mbfl_filt_conv_big5_wchar to read past the allocated buffer. This may lead to information disclosure or crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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（PHP：Hypertext Preprocessor，PHP：超文本预处理器）是PHPGroup和开放源代码社区的共同维护的一种开源的通用计算机脚本语言。该语言主要用于Web开发，支持多种数据库及操作系统。 PHP 7.2.27之前的7.2.x版本、7.3.14之前的7.3.x版本和7.4.2之前的7.4.x版本中存在缓冲区错误漏洞。攻击者可利用该漏洞获取信息或造成应用程序崩溃。
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
PHP Group PHP 7.2.x ~ 7.2.27 -

II. Public POCs for CVE-2020-7060

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III. Intelligence Information for CVE-2020-7060

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Vendor Advisories for CVE-2020-7060 (7)

Mailing List Discussions for CVE-2020-7060 (5)

Other References for CVE-2020-7060 (2)

IV. Related Vulnerabilities

Same product: PHP
Same vendor: PHP Group
Same weakness: CWE-125

V. Comments for CVE-2020-7060

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