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CVE-2018-6553— AppArmor cupsd Sandbox Bypass Due to Use of Hard Links

Quick assessment

Affected
n/a cups
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.

Ubuntu是英国科能（Canonical）公司和Ubuntu基金会共同开发的一套以桌面应用为主的GNU/Linux操作系统。CUPS是其中的一套开源的用于OS X和类Unix系统的打印系统。 Ubuntu中的CUPS存在安全漏洞，该漏洞源于CUPS AppArmor配置文件没有正确的限制dnssd后端。本地攻击者可利用该漏洞绕过限制。以下版本受到影响：CUPS 2.2.7-1ubuntu2.1之前版本（Ubuntu 18.04 LTS版本），2.2.4-7ubuntu3.1之前版本（Ubuntu 17.

AI Predicted 5.6 Difficulty: Easy EPSS 0.39% · P31
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I. Basic Information for CVE-2018-6553

Vulnerability Information
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Vulnerability Title
AppArmor cupsd Sandbox Bypass Due to Use of Hard Links
Source: CVE Program / CVE List V5
Vulnerability Description
The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue to escape confinement. This flaw affects versions prior to 2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1 in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS, and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS.
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
Ubuntu CUPS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ubuntu是英国科能（Canonical）公司和Ubuntu基金会共同开发的一套以桌面应用为主的GNU/Linux操作系统。CUPS是其中的一套开源的用于OS X和类Unix系统的打印系统。 Ubuntu中的CUPS存在安全漏洞，该漏洞源于CUPS AppArmor配置文件没有正确的限制dnssd后端。本地攻击者可利用该漏洞绕过限制。以下版本受到影响：CUPS 2.2.7-1ubuntu2.1之前版本（Ubuntu 18.04 LTS版本），2.2.4-7ubuntu3.1之前版本（Ubuntu 17.
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
- cups unspecified ~ 2.2.7-1ubuntu2.1 -
- cups unspecified ~ 2.2.4-7ubuntu3.1 -
- cups unspecified ~ 2.1.3-4ubuntu0.5 -
- cups unspecified ~ 1.7.2-0ubuntu1.10 -

II. Public POCs for CVE-2018-6553

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III. Intelligence Information for CVE-2018-6553

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Vendor Advisories for CVE-2018-6553 (3)

Mailing List Discussions for CVE-2018-6553 (1)

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

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CVE-2018-11492 ASUS HG100 安全漏洞
CVE-2018-14028 WordPress 安全漏洞
CVE-2018-14503 Coremail XT 跨站脚本漏洞
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CVE-2018-7754 Linux kernel 日志信息泄露漏洞
CVE-2018-10769 SmartMesh 安全漏洞
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-2018-6556 The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files

IV. Related Vulnerabilities

Same product: cups
Same vendor: n/a

V. Comments for CVE-2018-6553

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