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Bug 839354 (CVE-2022-24859)

Summary: <dev-python/PyPDF2-1.27.5: infinite loop vulnerability
Product: Gentoo Security Reporter: John Helmert III <ajak>
Component: VulnerabilitiesAssignee: 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 Gentoo Infrastructure gentoo-dev Security 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 Gentoo Infrastructure gentoo-dev Security 2022-04-19 15:46:05 UTC
Thanks! Low impact, all done!