Vulnerability in Py-Pdf Pypdf
CVE-2023-36464
pypdf is an open source, pure-python PDF library. In affected versions an attacker may craft a PDF which leads to an infinite loop if `__parse_content_stream` is executed. That is, for example, the case if the user extracted text from such a PDF. This issue was introduced in pull request #969 and resolved in pull request #1828. Users are advised to upgrade. Users unable to upgrade may modify the line `while peek not in (b"\r", b"\n")` in `pypdf/generic/_data_structures.py` to `while peek not in (b"\r", b"\n", b"")`.
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: 0.004 (29.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Py-Pdf Pypdf — versions pypdf: < 3.90, PyPDF2: >= 2.2.0
- Pypdf2 Project
- Pypdf Project
Weakness classification (CWE)
References
- github.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8 (Exploit, Patch)
- github.com/py-pdf/pypdf/pull/1828 (Patch)
- github.com/py-pdf/pypdf/pull/969 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2023-36464?
- CVE-2023-36464 is a medium-severity vulnerability in Py-Pdf Pypdf, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.2/10. Published 2023-06-27.
- How severe is CVE-2023-36464?
- Medium severity. CVSS v3 base score is 6.2 out of 10.