Bug 839354 (CVE-2022-24859)

Summary:	<dev-python/PyPDF2-1.27.5: infinite loop vulnerability
Product:	Gentoo Security	Reporter:	John Helmert III <ajak>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	minor	CC:	python
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79
Whiteboard:	B3 [noglsa]
Package list:		Runtime testing required:	---
Bug Depends on:	839372
Bug Blocks:

Description John Helmert III archtester

2022-04-19 02:03:25 UTC

CVE-2022-24859

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.

Please stabilize 1.27.5.

Comment 1 Larry the Git Cow gentoo-dev

2022-04-19 06:53:45 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c3ec427ca440b2414083291e19982faec6e37b6e

commit c3ec427ca440b2414083291e19982faec6e37b6e
Author:     Arthur Zamarin <arthurzam@gentoo.org>
AuthorDate: 2022-04-19 06:53:20 +0000
Commit:     Arthur Zamarin <arthurzam@gentoo.org>
CommitDate: 2022-04-19 06:53:20 +0000

    dev-python/PyPDF2: drop 1.26.0-r2, 1.27.1, 1.27.3, 1.27.4
    
    Bug: https://bugs.gentoo.org/839354
    Signed-off-by: Arthur Zamarin <arthurzam@gentoo.org>

 dev-python/PyPDF2/Manifest                         |  4 ---
 dev-python/PyPDF2/PyPDF2-1.26.0-r2.ebuild          | 33 ------------------
 dev-python/PyPDF2/PyPDF2-1.27.1.ebuild             | 39 ----------------------
 dev-python/PyPDF2/PyPDF2-1.27.3.ebuild             | 39 ----------------------
 dev-python/PyPDF2/PyPDF2-1.27.4.ebuild             | 39 ----------------------
 .../PyPDF2/files/PyPDF2-1.26.0-py3-tests.patch     | 35 -------------------
 6 files changed, 189 deletions(-)

Comment 2 John Helmert III archtester

2022-04-19 15:46:05 UTC

Thanks! Low impact, all done!