CVE-2023-36464 — MEDIUM (6.2)

Vulnerability 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"")`.

CVSS Score

6.2

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Pypdf Project	Pypdf	< 3.9.0
Pypdf2 Project	Pypdf2	>= 2.2.0

Related Weaknesses (CWE)

CWE-835

References

https://github.com/py-pdf/pypdf/pull/1828Patch
https://github.com/py-pdf/pypdf/pull/969Issue TrackingPatch
https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8ExploitPatch
https://github.com/py-pdf/pypdf/pull/1828Patch
https://github.com/py-pdf/pypdf/pull/969Issue TrackingPatch
https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8ExploitPatch

FAQ

What is CVE-2023-36464?

CVE-2023-36464 is a vulnerability with a CVSS score of 6.2 (MEDIUM). 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 ca...

How severe is CVE-2023-36464?

CVE-2023-36464 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2023-36464?

Check the references section above for vendor advisories and patch information. Affected products include: Pypdf Project Pypdf, Pypdf2 Project Pypdf2.