Vulnerability identifier: #VU77755

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-36464

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

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

Vendor: Pypdf Project

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop if __parse_content_stream is executed. A remote attacker can consume all available system resources and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PyPDF: 3.0.0 - 3.8.1

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External links
http://github.com/py-pdf/pypdf/pull/969
http://github.com/py-pdf/pypdf/pull/1828
http://github.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8

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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.