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CVE-2018-6556— The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files

Quick assessment

Affected
n/a LXC
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.

LXC（LinuX Containers）是Linux内核容器功能的一个用户空间接口，它通过强大的API和简单的工具，使Linux用户易于创建和管理系统或应用容器。 LXC 2.0版本至2.0.9版本和3.0.0版本至3.0.2之前的版本中存在安全漏洞，该漏洞源于程序在删除网络接口时，会自动打开用户所提供的路径。攻击者可利用该漏洞检测攻击者不能访问的路径是否存在。

AI Predicted 5.5 Difficulty: Trivial EPSS 0.33% · P26
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I. Basic Information for CVE-2018-6556

Vulnerability Information
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Vulnerability Title
The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files
Source: CVE Program / CVE List V5
Vulnerability Description
lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
LXC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LXC（LinuX Containers）是Linux内核容器功能的一个用户空间接口，它通过强大的API和简单的工具，使Linux用户易于创建和管理系统或应用容器。 LXC 2.0版本至2.0.9版本和3.0.0版本至3.0.2之前的版本中存在安全漏洞，该漏洞源于程序在删除网络接口时，会自动打开用户所提供的路径。攻击者可利用该漏洞检测攻击者不能访问的路径是否存在。
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
- LXC 2.0.9 ~ 2.0* -

II. Public POCs for CVE-2018-6556

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III. Intelligence Information for CVE-2018-6556

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Vendor Advisories for CVE-2018-6556 (4)

Mailing List Discussions for CVE-2018-6556 (4)

Same Patch Batch · n/a · 2018-08-10 · 16 CVEs total

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CVE-2018-15185 PHP Scripts Mall Naukri/Shine/Jobsite Clone Script 安全漏洞
CVE-2018-15186 PHP Scripts Mall Chartered Accountant:Auditor Website 跨站请求伪造漏洞
CVE-2018-15187 PHP Scripts Mall advanced-real-estate-script 跨站请求伪造漏洞
CVE-2018-15188 PHP Scripts Mall advanced-real-estate-script 安全漏洞
CVE-2018-15189 PHP Scripts Mall advanced-real-estate-script 跨站脚本漏洞
CVE-2018-6553 AppArmor cupsd Sandbox Bypass Due to Use of Hard Links

IV. Related Vulnerabilities

Same product: LXC
Same vendor: n/a

V. Comments for CVE-2018-6556

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