Ubuntu update for ghostscript

1) Code Injection

EUVDB-ID: #VU56385

Risk: High

CVSSv4.0: 8.9 [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:P/U:Amber]

CVE-ID: CVE-2021-3781

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: Yes

Description

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

The vulnerability exists due to improper input validation. A remote attacker can create a specially crafted SVG file, upload it to the affected system and execute arbitrary code.

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

Mitigation

Update the affected package ghostscript to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.04

libgs9 (Ubuntu package): before 9.50~dfsg-5ubuntu4.3

ghostscript (Ubuntu package): before 9.50~dfsg-5ubuntu4.3

CPE2.3

• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:21.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:libgs9_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:ghostscript_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-5075-1

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. However, proof of concept for this vulnerability is available.