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CVE-2019-11045— DirectoryIterator class silently truncates after a null byte

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 7.2.26之前的7.2.x版本、7.3.13之前的7.3.x版本和7.4.0版本中存在注入漏洞，该漏洞源于PHP DirectoryIterator接收带有嵌入字符的文件名，并在该字符处进行截断。

CVSS 3.7 · Low EPSS 8.82% · P95

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2019-11045

Vulnerability Information
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Vulnerability Title
DirectoryIterator class silently truncates after a null byte
Source: CVE Program / CVE List V5
Vulnerability Description
In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0, PHP DirectoryIterator class accepts filenames with embedded \0 byte and treats them as terminating at that byte. This could lead to security vulnerabilities, e.g. in applications checking paths that the code is allowed to access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/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 注入漏洞
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 7.2.26之前的7.2.x版本、7.3.13之前的7.3.x版本和7.4.0版本中存在注入漏洞，该漏洞源于PHP DirectoryIterator接收带有嵌入字符的文件名，并在该字符处进行截断。
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 ~ 7.2.26 -

II. Public POCs for CVE-2019-11045

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III. Intelligence Information for CVE-2019-11045

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Vendor Advisories for CVE-2019-11045 (4)

Mailing List Discussions for CVE-2019-11045 (7)

Other References for CVE-2019-11045 (2)

Same Patch Batch · PHP Group · 2019-12-23 · 6 CVEs total

CVE-2019-11049 6.5 MEDIUM mail() may release string with refcount==1 twice
CVE-2019-11047 4.8 MEDIUM Heap-buffer-overflow READ in exif
CVE-2019-11050 4.8 MEDIUM Use-after-free in exif parsing under memory sanitizer
CVE-2019-11044 3.7 LOW link() silently truncates after a null byte on Windows
CVE-2019-11046 3.7 LOW Buffer underflow in bc_shift_addsub

IV. Related Vulnerabilities

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

V. Comments for CVE-2019-11045

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