| Name | CVE-2023-36807 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| pypdf2 (PTS) | jessie | 1.23+git20141008-1+deb8u1 | fixed |
| stretch (security) | 1.26.0-2+deb9u1 | fixed | |
| stretch (lts), stretch | 1.26.0-2+deb9u2 | fixed | |
| buster (security), buster, buster (lts) | 1.26.0-2+deb10u2 | fixed | |
| bullseye | 1.26.0-4+deb11u1 | fixed | |
| bookworm | 2.12.1-3+deb12u1 | fixed | |
| sid | 2.12.1-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| pypdf2 | source | jessie | (not affected) | |||
| pypdf2 | source | stretch | (not affected) | |||
| pypdf2 | source | buster | (not affected) | |||
| pypdf2 | source | bullseye | (not affected) | |||
| pypdf2 | source | (unstable) | 2.10.7-1 |
[bullseye] - pypdf2 <not-affected> (only version 2.10.5 is affected)
[buster] - pypdf2 <not-affected> (only version 2.10.5 is affected)
https://github.com/py-pdf/pypdf/security/advisories/GHSA-hm9v-vj3r-r55m
https://github.com/py-pdf/pypdf/issues/1329
https://github.com/py-pdf/pypdf/pull/1331
Fixed by: https://github.com/py-pdf/pypdf/commit/e6531a25325e7e0174b6a1ba03b57320b5227f6b (2.10.6)
[stretch] - pypdf2 <not-affected> (only version 2.10.5 is affected)
[jessie] - pypdf2 <not-affected> (only version 2.10.5 is affected)