A vulnerability has been found in Xfce Thunar up to 1.6.14 and classified as problematic. Affected by this vulnerability is an unknown code of the component IBus-Unikey Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The bug was discovered 10/18/2018. The weakness was published 10/19/2018 (Website). It is possible to read the advisory at 0xd0ff9.wordpress.com. This vulnerability is known as CVE-2018-18398 since 10/16/2018. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.6.15 eliminates this vulnerability.

Productinfo

Vendor

• Xfce

Name

• Thunar

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14

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CPE 2.2info

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