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)
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-36810US | medium6.5 | — | ||
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 l… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-jrm6-h9cq-8gqwADVISORY
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/commit/c6c56f550bb384e05f0139c796ba1308837d6373FIX
- https://github.com/py-pdf/pypdf/issues/582WEB
- https://github.com/py-pdf/pypdf/pull/808WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-jrm6-h9cq-8gqwWEB
- https://lists.debian.org/debian-lts-announce/2023/07/msg00019.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-36810ADVISORY
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