Advisory Severity Curation

PyPDF2 quadratic runtime with malformed PDF missing xref marker ### Impact An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. ### Patches https://github.com/py-pdf/pypdf/pull/808 ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ ### References * PyPDF2 PR #808 https://github.com/py-pdf/pypdf/pull/808 * PyPDF2 Issue #582 https://github.com/py-pdf/pypdf/issues/582

Inefficient Algorithmic Complexity pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. This issue has been addressed in PR 808 and versions from 1.27.9 include this fix. Users are advised to upgrade. There are no known workarounds for this vulnerability.

PyPDF2 quadratic runtime with malformed PDF missing xref marker ### Impact An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. ### Patches https://github.com/py-pdf/pypdf/pull/808 ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ ### References * PyPDF2 PR #808 https://github.com/py-pdf/pypdf/pull/808 * PyPDF2 Issue #582 https://github.com/py-pdf/pypdf/issues/582

PyPDF2 quadratic runtime with malformed PDF missing xref marker ### Impact An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. ### Patches https://github.com/py-pdf/pypdf/pull/808 ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ ### References * PyPDF2 PR #808 https://github.com/py-pdf/pypdf/pull/808 * PyPDF2 Issue #582 https://github.com/py-pdf/pypdf/issues/582