CVE-2023-36807
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in. High risk of service disruption.
- Exploit odds
- 0.6% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.6% in the next 30 days (EPSS).
- Severity: 6.2 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.6% · EPSS, next 30 days
- Weakness
- CWE-835
- Record status
- Modified
Affected
- py-pdf Pypdf 2.10.5
Attack profile CVSS 3.1 · 6.2
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2023-36807.md and follow it. Check whether this project is affected by CVE-2023-36807. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/py-pdf/pypdf/issues/1329
- https://github.com/py-pdf/pypdf/pull/1331
- 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
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-hm9v-vj3r-r55m
References
- https://github.com/py-pdf/pypdf/issues/1329
- https://github.com/py-pdf/pypdf/pull/1331
- 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
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-hm9v-vj3r-r55m