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CVE-2019-3902

Quick assessment

Affected
The Mercurial Project mercurial
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.

Mercurial是Matt Mackall软件开发者的一套使用Python语言编写的跨平台的分布式版本控制软件。该软件支持同时处理纯文本和二进制文件等。 Mercurial 4.9之前版本中存在安全漏洞。攻击者可利用该漏洞绕过路径检查逻辑，向库之外的其他位置写入文件。

AI Predicted 7.8 Difficulty: Easy EPSS 1.37% · P72
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I. Basic Information for CVE-2019-3902

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Mercurial before 4.9. It was possible to use symlinks and subrepositories to defeat Mercurial's path-checking logic and write files outside a repository.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Mercurial 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mercurial是Matt Mackall软件开发者的一套使用Python语言编写的跨平台的分布式版本控制软件。该软件支持同时处理纯文本和二进制文件等。 Mercurial 4.9之前版本中存在安全漏洞。攻击者可利用该漏洞绕过路径检查逻辑，向库之外的其他位置写入文件。
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 Mercurial Project mercurial before 4.9 -

II. Public POCs for CVE-2019-3902

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III. Intelligence Information for CVE-2019-3902

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Vendor Advisories for CVE-2019-3902 (1)

Mailing List Discussions for CVE-2019-3902 (2)

Other References for CVE-2019-3902 (1)

IV. Related Vulnerabilities

Same product: mercurial
Same weakness: CWE-22

V. Comments for CVE-2019-3902

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