#VU30332 Code Injection in gThumb - CVE-2019-20326

Vulnerability identifier: #VU30332

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-20326

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

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

Vendor: Gnome Development Team

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in a crafted JPEG file. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Update to version 3.8.3.

Vulnerable software versions

gThumb: 3.8.0 - 3.8.2

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External links
https://github.com/Fysac/CVE-2019-20326
https://gitlab.gnome.org/GNOME/gthumb/commit/4faa5ce2358812d23a1147953ee76f59631590ad
https://gitlab.gnome.org/GNOME/gthumb/commit/ca8f528209ab78935c30e42fe53bdf1a24f3cb44
https://gitlab.gnome.org/GNOME/gthumb/commits/master/extensions/cairo_io/cairo-image-surface-jpeg.c

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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.