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CVE-2020-7066— get_headers() silently truncates after a null byte

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（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 7.2.29之前的7.2.x版本、7.3.16之前的7.3.x版本和7.4.4之前的7.4.x版本中的‘get_headers()’函数存在安全漏洞。攻击者可利用该漏洞造成信息泄露。

CVSS 5.3 · Medium EPSS 2.77% · P86

Possible ATT&CK Techniques 1 AI

T1134 · Access Token Manipulation
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I. Basic Information for CVE-2020-7066

Vulnerability Information
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Vulnerability Title
get_headers() silently truncates after a null byte
Source: CVE Program / CVE List V5
Vulnerability Description
In PHP versions 7.2.x below 7.2.29, 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using get_headers() with user-supplied URL, if the URL contains zero (\0) character, the URL will be silently truncated at it. This may cause some software to make incorrect assumptions about the target of the get_headers() and possibly send some information to a wrong server.
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:N
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的空终结符
Source: CVE Program / CVE List V5
Vulnerability Title
PHP 安全漏洞
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 7.2.29之前的7.2.x版本、7.3.16之前的7.3.x版本和7.4.4之前的7.4.x版本中的‘get_headers()’函数存在安全漏洞。攻击者可利用该漏洞造成信息泄露。
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 below 7.2.29 -

II. Public POCs for CVE-2020-7066

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III. Intelligence Information for CVE-2020-7066

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Vendor Advisories for CVE-2020-7066 (2)

Mailing List Discussions for CVE-2020-7066 (2)

Other References for CVE-2020-7066 (2)

Same Patch Batch · PHP Group · 2020-04-01 · 3 CVEs total

CVE-2020-7065 7.4 HIGH mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full
CVE-2020-7064 6.5 MEDIUM Use-of-uninitialized-value in exif

IV. Related Vulnerabilities

Same product: PHP
Same vendor: PHP Group
Same weakness: CWE-170

V. Comments for CVE-2020-7066

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