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CVE-2021-31998— inn: %post calls user owned file allowing local privilege escalation to root

Quick assessment

Affected
SUSE SUSE Linux Enterprise Server 11-SP3
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.

openSUSE是德国SUSE公司的一套基于Linux的自由操作系统与开源社区项目。 openSUSE 存在安全漏洞，攻击者可利用该漏洞通过inn的inupgrade绕过限制，进行权限提升。

CVSS 6.8 · Medium EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-31998

Vulnerability Information
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Vulnerability Title
inn: %post calls user owned file allowing local privilege escalation to root
Source: CVE Program / CVE List V5
Vulnerability Description
A Incorrect Default Permissions vulnerability in the packaging of inn of SUSE Linux Enterprise Server 11-SP3; openSUSE Backports SLE-15-SP2, openSUSE Leap 15.2 allows local attackers to escalate their privileges from the news user to root. This issue affects: SUSE Linux Enterprise Server 11-SP3 inn version inn-2.4.2-170.21.3.1 and prior versions. openSUSE Backports SLE-15-SP2 inn versions prior to 2.6.2. openSUSE Leap 15.2 inn versions prior to 2.6.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
缺省权限不正确
Source: CVE Program / CVE List V5
Vulnerability Title
openSUSE 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
openSUSE是德国SUSE公司的一套基于Linux的自由操作系统与开源社区项目。 openSUSE 存在安全漏洞，攻击者可利用该漏洞通过inn的inupgrade绕过限制，进行权限提升。
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
SUSE SUSE Linux Enterprise Server 11-SP3 inn ~ inn-2.4.2-170.21.3.1 -
openSUSE openSUSE Backports SLE-15-SP2 inn ~ 2.6.2 -
openSUSE openSUSE Leap 15.2 inn ~ 2.6.2 -

II. Public POCs for CVE-2021-31998

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III. Intelligence Information for CVE-2021-31998

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Vendor Advisories for CVE-2021-31998 (1)

IV. Related Vulnerabilities

Same vendor: SUSE
Same weakness: CWE-276

V. Comments for CVE-2021-31998

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