Amazon Linux AMI update for ghostscript

1) Out-of-bounds write

EUVDB-ID: #VU80809

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-21890

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the clj_media_size() function in devices/gdevclj.c. A remote attacker can trick the victim to open a specially crafted PDF file, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected packages:

i686:
    ghostscript-debuginfo-8.70-24.30.amzn1.i686
    ghostscript-8.70-24.30.amzn1.i686
    ghostscript-devel-8.70-24.30.amzn1.i686
    ghostscript-doc-8.70-24.30.amzn1.i686

src:
    ghostscript-8.70-24.30.amzn1.src

x86_64:
    ghostscript-debuginfo-8.70-24.30.amzn1.x86_64
    ghostscript-doc-8.70-24.30.amzn1.x86_64
    ghostscript-8.70-24.30.amzn1.x86_64
    ghostscript-devel-8.70-24.30.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

ghostscript: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:a:amazon_web_services:ghostscript:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/ALAS-2023-1835.html

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.