// For flags

CVE-2023-46250

pypdf possible Infinite Loop when PdfWriter(clone_from) is used with a PDF

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions 3.7.0 through 3.16.4 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 when the pypdf-user manipulates an incoming malicious PDF e.g. by merging it with another PDF or by adding annotations. The issue was fixed in version 3.17.0. As a workaround, apply the patch manually by modifying `pypdf/generic/_data_structures.py`.

pypdf es una librería de PDF pura de Python gratuita y de código abierto. Un atacante que utilice una vulnerabilidad presente en las versiones 3.7.0 a 3.16.4 puede crear un PDF que genere un bucle infinito. Este bucle infinito bloquea el proceso actual y puede utilizar un solo núcleo de la CPU al 100%. No afecta el uso de la memoria. Ese es, por ejemplo, el caso cuando el usuario de pypdf manipula un PDF malicioso entrante, por ejemplo fusionándolo con otro PDF o agregando anotaciones. El problema se solucionó en la versión 3.17.0. Como workaround, aplique el parche manualmente modificando `pypdf/generic/_data_structures.py`.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-10-19 CVE Reserved
  • 2023-10-31 CVE Published
  • 2023-11-09 EPSS Updated
  • 2024-09-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Pypdf Project
Search vendor "Pypdf Project"
 Pypdf
Search vendor "Pypdf Project" for product "Pypdf"
 >= 3.7.0 < 3.17.0
Search vendor "Pypdf Project" for product "Pypdf" and version " >= 3.7.0 < 3.17.0"
-
Affected