#VU20504 Input validation error in gnome-desktop - CVE-2019-11460

Vulnerability identifier: #VU20504

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-11460

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gnome-desktop
Universal components / Libraries / Libraries used by multiple products

Vendor: Gnome Development Team

Description

The vulnerability allows a remote 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 remote 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

gnome-desktop : 3.26.0 - 3.32.1

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External links
https://gitlab.gnome.org/GNOME/gnome-desktop/issues/112

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.