Bug 2247314 (CVE-2023-46250)

Summary: CVE-2023-46250 pypdf: infinite loop condition may be triggered to cause denial of service
Product: [Other] Security Response Reporter: Robb Gatica <rgatica>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: pypdf 3.17.0 Doc Type: If docs needed, set a value
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Bug Depends On: 2247315    
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Description Robb Gatica 2023-10-31 20:15:30 UTC 
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions 3.7.0 through 3.16.4 can craft a PDF which leads to an infinite loop. This infinite loop blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. That is, for example, the case when the pypdf-user manipulates an incoming malicious PDF e.g. by merging it with another PDF or by adding annotations. The issue was fixed in version 3.17.0. As a workaround, apply the patch manually by modifying `pypdf/generic/_data_structures.py`.

References:
https://github.com/py-pdf/pypdf/commit/9b23ac3c9619492570011d551d521690de9a3e2d
https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjcc-cq79-p63f
https://github.com/py-pdf/pypdf/pull/2264
Comment 1 Robb Gatica 2023-10-31 20:15:43 UTC 
Created python-PyPDF2 tracking bugs for this issue:

Affects: fedora-all [bug 2247315]