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CVE-2023-36464

6.2 · MEDIUM

pypdf is an open source, pure-python PDF library.

Published Jun 27, 2023CWE-835EPSS 0.35%

Overview

CVE-2023-36464 is a medium-severity vulnerability. It was published on June 27, 2023 and has a CVSS 3.1 base score of 6.2 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.2, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

pypdf is an open source, pure-python PDF library. In affected versions an attacker may craft a PDF which leads to an infinite loop if `__parse_content_stream` is executed. That is, for example, the case if the user extracted text from such a PDF. This issue was introduced in pull request #969 and resolved in pull request #1828. Users are advised to upgrade. Users unable to upgrade may modify the line `while peek not in (b"\r", b"\n")` in `pypdf/generic/_data_structures.py` to `while peek not in (b"\r", b"\n", b"")`.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/py-pdf/pypdf/pull/1828GitHubgithub.com/py-pdf/pypdf/pull/969GitHubgithub.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8GitHubgithub.com/py-pdf/pypdf/pull/1828GitHubgithub.com/py-pdf/pypdf/pull/969GitHubgithub.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8

How CyberStrike helps

Frequently asked questions

What is CVE-2023-36464?

CVE-2023-36464 is a medium-severity vulnerability. It was published on June 27, 2023 and has a CVSS 3.1 base score of 6.2 (MEDIUM).

How severe is CVE-2023-36464?

This vulnerability has a CVSS 3.1 base score of 6.2, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-36464?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-36464?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-36464 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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