CVE-2022-24859
In versions prior to 1.27.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 if the code attempts to get the content stream.
Does this matter?
Lower severity and a low EPSS score (1.32%). Track it; it rarely justifies an emergency change on its own.
Description
PyPDF2 is an open source python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In versions prior to 1.27.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 if the code attempts to get the content stream. The reason is that the last while-loop in `ContentStream._readInlineImage` only terminates when it finds the `EI` token, but never actually checks if the stream has already ended. This issue has been resolved in version `1.27.5`. Users unable to upgrade should validate and PDFs prior to iterating over their content stream.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 1.32% probability · 69th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- pypdf2 project/pypdf2 · debian/debian linux
- Source
- security-advisories@github.com
References
- https://github.com/py-pdf/PyPDF2/issues/329Exploit, Third Party Advisory
- https://github.com/py-pdf/PyPDF2/pull/740Patch, Third Party Advisory
- https://github.com/py-pdf/PyPDF2/releases/tag/1.27.5Release Notes, Third Party Advisory
- https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00001.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00013.html
- https://github.com/py-pdf/PyPDF2/issues/329Exploit, Third Party Advisory
- https://github.com/py-pdf/PyPDF2/pull/740Patch, Third Party Advisory
- https://github.com/py-pdf/PyPDF2/releases/tag/1.27.5Release Notes, Third Party Advisory
- https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00001.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00013.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.