NULL pointer dereference in GNOME font viewer



| Updated: 2021-09-21
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-19308
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Gnome Font Viewer
Client/Desktop applications / Multimedia software

Vendor Gnome Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU23073

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-19308

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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

CPE2.3 External links

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


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.



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