CVE-2021-31998 - CVE House
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Status published Medium CVE-2021-31998

inn: %post calls user owned file allowing local privilege escalation to root

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Johannes Segitz of SUSE

References

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Affected Vendor

Affected Software

SUSE Linux Enterprise Server 11-SP3, openSUSE Backports SLE-15-SP2, openSUSE Leap 15.2
Vulnerable Versions:
inn

Timeline

Official Publish: June 10th, 2021
Last Modified: September 16th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Weaknesses (CWE)

CWE-276

MITRE ATT&CK TTPs

T1222 File and Directory Permissions Modification
Defense Evasion
T1078 Valid Accounts
Persistence
T1574 Hijack Execution Flow
Privilege Escalation
T1021 Remote Services
Lateral Movement
T1005 Data from Local System
Collection