#VU6661 Improper input validation in smb4k - CVE-2017-8849

Vulnerability identifier: #VU6661

Vulnerability risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2017-8849

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
smb4k
Universal components / Libraries / Libraries used by multiple products

Vendor: KDE.org

Description
The vulnerability allows a local user to elevate privileges.

The vulnerability exists due to an input validation error when verify arguments, sent to the mount helper DBUS service.A local user can send a specially crafted request and execute arbitrary code on the system with root privileges.

Mitigation
Update to version 2.0.1.

Vulnerable software versions

smb4k: 1.2.3 - 2.0.0

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External links
https://www.openwall.com/lists/oss-security/2017/05/10/3
https://www.kde.org/info/security/advisory-20170510-2.txt

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.