Vulnerability identifier: #VU70428

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-35511

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

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

Vendor: libpng

Description

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

The vulnerability exists due to a boundary error when processing PNG files within the pngcheck function. A remote attacker can pass a specially crafted PNG file to the application, trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

pngcheck: 2.0.0 - 2.4.0

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External links
http://www.libpng.org/pub/png/apps/pngcheck.html
http://www.debian.org/security/2022/dsa-5300
http://lists.debian.org/debian-lts-announce/2022/12/msg00024.html

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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.