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CVE-2023-45853

Smihica Pyminizip integer overflow

9.8 CRITICALEPSS 3.18%
  1. Published14 Oct 2023

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Smihica Pyminizip≤ 0.2.6
Zlib< 1.3.1

Remediation

Fixed in
Zlib≥ 1.3.1

References

and 4 more references

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Frequently asked

Is CVE-2023-45853 being actively exploited?

CVE-2023-45853 is not in the CISA KEV catalog. Its EPSS exploit probability is 3.18%.

How severe is CVE-2023-45853?

CVE-2023-45853 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 3.18% probability of exploitation.

Which products are affected by CVE-2023-45853?

Affected products include Smihica Pyminizip, Zlib.

How do I fix CVE-2023-45853?

Upgrade affected software to a fixed version, for example Zlib 1.3.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-45853 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.