Vulnerability in Py-Pdf Pypdf
CVE-2023-36807
pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In version 2.10.5 an attacker who uses this vulnerability 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 if the user extracted metadata from such a malformed PDF. Versions prior to 2.10.5 throw an error, but do not hang forever. This issue was fixed with https://github.com/py-pdf/pypdf/pull/1331 which has been included in release 2.10.6. Users are advised to upgrade. Users unable to upgrade should modify `PyPDF2/generic/_data_structures.py::read_object` to an an error throwing case. See GHSA-hm9v-vj3r-r55m for details.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Py-Pdf Pypdf — versions 2.10.5
- Pypdf Project — versions 2.10.5
Weakness classification (CWE)
References
- github.com/py-pdf/pypdf/security/advisories/GHSA-hm9v-vj3r-r55m (Exploit, Patch, Mitigation, Vendor Advisory)
- github.com/py-pdf/pypdf/issues/1329 (Exploit, Issue Tracking, Vendor Advisory)
- github.com/py-pdf/pypdf/pull/1331 (Patch)
Frequently asked questions
- What is CVE-2023-36807?
- CVE-2023-36807 is a medium-severity vulnerability in Py-Pdf Pypdf, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.2/10. Published 2023-06-30.
- How severe is CVE-2023-36807?
- Medium severity. CVSS v3 base score is 6.2 out of 10.