CVE-2023-45853
9.8
CRITICAL · CVSS 3.1 · EPSS 3.2% (pctl 88)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.18% — more likely to be exploited than 88% of all CVEs |
| Weakness | CWE-190 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2023-10-14 |
| Last modified | 2026-07-14 |
Affected (2)
| Vendor | Product |
|---|---|
| smihica | pyminizip |
| zlib | zlib |
References
- http://www.openwall.com/lists/oss-security/2023/10/20/9
- http://www.openwall.com/lists/oss-security/2024/01/24/10
- https://chromium.googlesource.com/chromium/src/+/d709fb23806858847131027da95ef4c548813356
- https://chromium.googlesource.com/chromium/src/+/de29dd6c7151d3cd37cb4cf0036800ddfb1d8b61
- https://github.com/madler/zlib/blob/ac8f12c97d1afd9bafa9c710f827d40a407d3266/contrib/README.contrib#L1-L4
- https://github.com/madler/zlib/pull/843
- https://lists.debian.org/debian-lts-announce/2023/11/msg00026.html
- https://pypi.org/project/pyminizip/#history
- https://security.gentoo.org/glsa/202401-18
- https://security.netapp.com/advisory/ntap-20231130-0009/
- https://www.winimage.com/zLibDll/minizip.html
- http://www.openwall.com/lists/oss-security/2023/10/20/9
- http://www.openwall.com/lists/oss-security/2024/01/24/10
- https://chromium.googlesource.com/chromium/src/+/d709fb23806858847131027da95ef4c548813356
- https://chromium.googlesource.com/chromium/src/+/de29dd6c7151d3cd37cb4cf0036800ddfb1d8b61
- https://github.com/madler/zlib/blob/ac8f12c97d1afd9bafa9c710f827d40a407d3266/contrib/README.contrib#L1-L4
- https://github.com/madler/zlib/pull/843
- https://lists.debian.org/debian-lts-announce/2023/11/msg00026.html
- https://pypi.org/project/pyminizip/#history
- https://security.gentoo.org/glsa/202401-18
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