[PyPDF2] Manipulated inline images can cause Infinite Loop in PyPDF2

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 user wrote the following code:

from PyPDF2 import PdfFileReader, PdfFileWriter
from PyPDF2.pdf import ContentStream

reader = PdfFileReader("malicious.pdf", strict=False)
for page in reader.pages:
    ContentStream(page.getContents(), reader)

Patches

PyPDF2==1.27.5 and later are patched.

Credits to Sebastian Krause for finding (issue) and fixing (PR) it.

References

• https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79
• https://nvd.nist.gov/vuln/detail/CVE-2022-24859
• https://github.com/py-pdf/PyPDF2/issues/329
• https://github.com/py-pdf/PyPDF2/pull/740
• https://github.com/py-pdf/PyPDF2/releases/tag/1.27.5
• https://github.com/advisories/GHSA-xcjx-m2pj-8g79