CVE-2023-45853

zlib: integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_6

Published Oct 14, 2023 CVSS 3.1 · 8.8 High EPSS 3.4% KEV · Not listed
Description
MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_64 via a long filename, comment, or extra field. NOTE: MiniZip is not a supported part of the zlib product. NOTE: pyminizip through 0.2.6 is also vulnerable because it bundles an affected zlib version, and exposes the applicable MiniZip code through its compress API.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3670-1 minizip security update
Github GHSA Github GHSA GHSA-mq29-j5xf-cjwr pyminizip affected by zlib's integer overflow/heap based buffer overflow vulnerability due to vulnerable dependency
Ubuntu USN Ubuntu USN USN-7107-1 zlib vulnerability
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics epss

{'score': 0.00382}

epss

{'score': 0.00691}

Type Values Removed Values Added
First Time appeared Smihica
Smihica pyminizip
CPEs cpe:2.3:a:smihica:pyminizip:*:*:*:*:*:python:*:*
Vendors & Products Smihica
Smihica pyminizip
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 14, 2026, 11:55 PM
Reserved
Oct 14, 2023, 12:00 AM
Status
Modified
Published
Oct 14, 2023, 2:15 AM
Modified
Oct 15, 2026, 12:16 AM
Severity
Moderate
Public date
Oct 14, 2023, 12:00 AM