CVE-2018-18398

Severity: medium (CVSS 4.7 v3.0)
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: yes
Published: 2018-10-19 · updated 2026-06-17
Weakness: CWE-125

Description

Xfce Thunar 1.6.15, when Xfce 4.12 is used, mishandles the IBus-Unikey input method for file searches within File Manager, leading to an out-of-bounds read and SEGV. This could potentially be exploited by an arbitrary local user who creates files in /tmp before the victim uses this input method.

Affected products

Xfce Thunar: before 1.6.15 — fixed in 1.6.15
Xfce: before 4.12 — fixed in 4.12

How to fix

Upgrade to a fixed version: Xfce Thunar 1.6.15; Xfce 4.12. Check the vendor advisory for mitigations.

References

https://0xd0ff9.wordpress.com/2018/10/18/cve-2018-18398/
https://0xd0ff9.wordpress.com/2018/10/18/cve-2018-18398/

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