CVE-2023-36807

2023-06-3019:15:09

CWE-835

[email protected]

web.nvd.nist.gov

pypdf

pdf

library

cve-2023-36807

vulnerability

infinite loop

cpu

security fix

upgrade

ghsa-hm9v-vj3r-r55m

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

6.2 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

36.1%

JSON

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.

Affected configurations

NVD

Node

pypdf_projectpypdfMatch2.10.5

CPENameOperatorVersion
pypdf_project:pypdfpypdf project pypdfeq2.10.5

CPE	Name	Operator	Version
pypdf_project:pypdf	pypdf project pypdf	eq	2.10.5

CNA Affected

[
  {
    "vendor": "py-pdf",
    "product": "pypdf",
    "versions": [
      {
        "version": "2.10.5",
        "status": "affected"
      }
    ]
  }
]