CVE-2021-25317: cups: ownership of /var/log/cups allows the lp user to create files as root

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-05 · updated 2026-10-08
Weakness: CWE-276

Description

A Incorrect Default Permissions vulnerability in the packaging of cups of SUSE Linux Enterprise Server 11-SP4-LTSS, SUSE Manager Server 4.0, SUSE OpenStack Cloud Crowbar 9; openSUSE Leap 15.2, Factory allows local attackers with control of the lp users to create files as root with 0644 permissions without the ability to set the content. This issue affects: SUSE Linux Enterprise Server 11-SP4-LTSS cups versions prior to 1.3.9. SUSE Manager Server 4.0 cups versions prior to 2.2.7. SUSE OpenStack Cloud Crowbar 9 cups versions prior to 1.7.5. openSUSE Leap 15.2 cups versions prior to 2.2.7. openSUSE Factory cups version 2.3.3op2-2.1 and prior versions.

Affected products

Fedoraproject Fedora: 32, 33, 34
SUSE Cups: before 1.3.9; before 2.2.7; before 1.7.5; through 2.3.3op2-2.1 — fixed in 1.3.9, 1.7.5, 2.2.7

How to fix

Upgrade to a fixed version: SUSE Cups 1.3.9, 1.7.5, 2.2.7. Check the vendor advisory for mitigations.

References

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