Vulnerability identifier: #VU23073

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19308

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gnome Font Viewer
Client/Desktop applications / Multimedia software

Vendor: Gnome Development Team

Description

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

The vulnerability exists due to a NULL pointer dereference error in text_to_glyphs in sushi-font-widget.c in Gnome font viewer while parsing a TTF font file that lacks a name section. A remote attacker can pass a specially crafted TTF file to the affected application and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Gnome Font Viewer: 3.33.4 - 3.34.0

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External links
http://github.com/GNOME/gnome-font-viewer/blob/919dfbe684b75904563b8c6723c9778a4e00aad7/src/sushi-font-widget.c#L115-L117
http://gitlab.gnome.org/GNOME/gnome-font-viewer/issues/17

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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.