#VU20506 Input validation error in Nautilus - CVE-2019-11461

Vulnerability identifier: #VU20506

Vulnerability risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-11461

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Nautilus
Client/Desktop applications / File managers, FTP clients

Vendor: Gnome Development Team

Description

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper filtering of the TIOCSTI ioctl on 64-bit systems. A local authenticated attacker can compromise the thumbnailer and escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl to push characters into the input buffer of the thumbnailer's controlling terminal.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nautilus: 3.30.0 - 3.32.0

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External links
https://gitlab.gnome.org/GNOME/nautilus/issues/987

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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.