Bug 2076488 (CVE-2022-24859) - CVE-2022-24859 PyPDF2: infinite loop vulnerability
Summary: CVE-2022-24859 PyPDF2: infinite loop vulnerability
Status: NEW
Alias: CVE-2022-24859
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2076490 2076489
Blocks: 2076491
TreeView+ depends on / blocked
Reported: 2022-04-19 07:50 UTC by Sandipan Roy
Modified: 2022-04-19 11:57 UTC (History)
2 users (show)

Fixed In Version: pypdf 1.27.5
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Clone Of:
Last Closed:

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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.


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]

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