Improper input validation in PostCSS

1) Input validation error

EUVDB-ID: #VU81307

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-44270

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to insufficient validation of external CSS files when parsing the "\r" character. A remote attacker can pass specially crafted input to the application and perform spoofing attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Postcss: 8.0.0 - 8.4.30

CPE2.3

• cpe:2.3::postcss:postcss:8.4.30:*:*:*:*:*:*:*
• cpe:2.3::postcss:postcss:8.4.14:*:*:*:*:*:*:*
• cpe:2.3::postcss:postcss:8.4.13:*:*:*:*:*:*:*

External links

http://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25
http://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5
http://github.com/postcss/postcss/releases/tag/8.4.31

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.