CVE-2022-24859

medium

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.

References

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

Details

Source: MITRE

Published: 2022-04-18

Updated: 2022-06-15

Type: CWE-835

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM