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CVE-2019-11049— mail() may release string with refcount==1 twice

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。 基于Windows平台的PHP 7.3.13之前的7.3.x版本和7.4.0版本中的‘mail()’函数存在资源管理错误漏洞。攻击者可借助特制标头利用该漏洞执行任意代码或导致拒绝服务。

CVSS 6.5 · Medium EPSS 4.22% · P91

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2019-11049

Vulnerability Information
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Vulnerability Title
mail() may release string with refcount==1 twice
Source: CVE Program / CVE List V5
Vulnerability Description
In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can result in double-freeing certain memory locations.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
PHP 资源管理错误漏洞
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。 基于Windows平台的PHP 7.3.13之前的7.3.x版本和7.4.0版本中的‘mail()’函数存在资源管理错误漏洞。攻击者可借助特制标头利用该漏洞执行任意代码或导致拒绝服务。
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 7.3.x ~ 7.3.13 -

II. Public POCs for CVE-2019-11049

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III. Intelligence Information for CVE-2019-11049

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Vendor Advisories for CVE-2019-11049 (2)

Mailing List Discussions for CVE-2019-11049 (3)

Other References for CVE-2019-11049 (2)

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

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-2019-11045 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-415

V. Comments for CVE-2019-11049

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