Bug 2076488 (CVE-2022-24859)

Summary:	CVE-2022-24859 PyPDF2: infinite loop vulnerability
Product:	[Other] Security Response	Reporter:	Sandipan Roy <saroy>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	bdettelb, itsme_410
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	pypdf 1.27.5	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2076489, 2076490
Bug Blocks:	2076491

Description Sandipan Roy 2022-04-19 07:50:49 UTC

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.

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

Comment 1 Sandipan Roy 2022-04-19 07:52:26 UTC

Created python-PyPDF2 tracking bugs for this issue:

Affects: fedora-34 [bug 2076489]
Affects: fedora-35 [bug 2076490]