CVE-2022-24859 Information

Description

PyPDF2 is an open source python PDF library capable of splitting merging cropping and transforming the pages of PDF files. In versions prior to 1.27.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 if the code attempts to get the content stream. The reason is that the last while-loop in ContentStream._readInlineImage only terminates when it finds the EI token but never actually checks if the stream has already ended. This issue has been resolved in version 1.27.5. Users unable to upgrade should validate and PDFs prior to iterating over their content stream.

CVSS Vector

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

Reference

https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79 https://github.com/py-pdf/PyPDF2/pull/740 https://github.com/py-pdf/PyPDF2/issues/329 https://github.com/py-pdf/PyPDF2/releases/tag/1.27.5 https://lists.debian.org/debian-lts-announce/2022/06/msg00001.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5