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CVE-2023-36807

Infinite Loop when reading malformed objects in pypdf

Published: Jun 30, 2023Updated: Nov 21, 2024 Sources: CVE List NVD GHSA BDUCWE-835
6.2MEDIUM
NVD MITRE
EPSS Score
0.6%
Top 55.8%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-835

Affected Products

pypdf project
oss-project
pypdfLibrary
OSS Libraries / generic-library
PyPI
package-ecosystem
PyPDF2
OSS Libraries
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Matthew Peveler
aka pypdf2
PyPDF2Library
OSS Libraries
py-pdf
package-ecosystemaka pypdf2, pypdf
pypdfOn-prem
OSS Libraries / pypi

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
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References

https://github.com/py-pdf/pypdf/issues/1329
github.com
https://github.com/py-pdf/pypdf/pull/1331
github.com
https://github.com/py-pdf/pypdf/security/advisories/GHSA-hm9v-vj3r-r55m
github.com
and 11 more references View all →

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