Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2019-11044— link() silently truncates after a null byte on Windows

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版本中存在安全漏洞，该漏洞源于‘link’函数会在字符处截断文件名称。攻击者可借助特制文件名利用该漏洞绕过安全限制。

CVSS 3.7 · Low EPSS 5.12% · P92

Possible ATT&CK Techniques 1 AI

T1222.002 · Linux and Mac Permissions
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2019-11044

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
link() silently truncates after a null byte on Windows
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 on Windows, PHP link() function 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 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 7.2.26之前的7.2.x版本、7.3.13之前的7.3.x版本和7.4.0版本中存在安全漏洞，该漏洞源于‘link’函数会在字符处截断文件名称。攻击者可借助特制文件名利用该漏洞绕过安全限制。
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-2019-11044

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2019-11044

请登录查看更多情报信息。

Vendor Advisories for CVE-2019-11044 (1)

Mailing List Discussions for CVE-2019-11044 (2)

Other References for CVE-2019-11044 (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-2019-11045 3.7 LOW DirectoryIterator class silently truncates after a null byte
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-2019-11044

No comments yet

Leave a comment