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CVE-2018-16840

Quick assessment

Affected
The Curl Project curl
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.

Haxx curl是瑞典Haxx公司的一套利用URL语法在命令行下工作的文件传输工具。该工具支持文件上传和下载，并包含一个用于程序开发的libcurl（客户端URL传输库）。 Haxx curl 7.59.0版本至7.61.1版本中的‘Curl_close()’函数存在资源管理错误漏洞。该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。

AI Predicted 6.5 Difficulty: Moderate EPSS 3.40% · P88

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2018-16840

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Haxx curl 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Haxx curl是瑞典Haxx公司的一套利用URL语法在命令行下工作的文件传输工具。该工具支持文件上传和下载，并包含一个用于程序开发的libcurl（客户端URL传输库）。 Haxx curl 7.59.0版本至7.61.1版本中的‘Curl_close()’函数存在资源管理错误漏洞。该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。
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
The Curl Project curl from 7.59.0 to 7.61.1 -

II. Public POCs for CVE-2018-16840

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III. Intelligence Information for CVE-2018-16840

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Patches & Fixes for CVE-2018-16840 (1)

Vendor Advisories for CVE-2018-16840 (4)

Other References for CVE-2018-16840 (1)

Same Patch Batch · The Curl Project · 2018-10-31 · 3 CVEs total

CVE-2018-16839 Haxx curl 缓冲区错误漏洞
CVE-2018-16842 Haxx curl 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: curl
Same vendor: The Curl Project
Same weakness: CWE-416

V. Comments for CVE-2018-16840

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