CVE-2023-45853: MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_64 via a long filename,
Noroxi assessment
Priority: Plan (action score 40/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 3.4% (FIRST EPSS); higher than 88.9% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: minizip (Debian:10) 1.1-8+deb10u1; minizip (Debian:12) 1.1-8+deb12u1; zlib (Debian:13) 1:1.3.dfsg-2.
Add it to your regular patch cycle. Upgrade to minizip (Debian:10) 1.1-8+deb10u1; minizip (Debian:12) 1.1-8+deb12u1; zlib (Debian:13) 1:1.3.dfsg-2 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Oct 14, 2023
- Updated
- Oct 15, 2026
- EPSS
- 3.4% · 88th percentile
- CWE
- CWE-190
Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 9.8
- CNA · mitre
- 8.8
- 1.0 point gap
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- smihica pyminizipup to 0.2.6 inclusive
- zlib zlibbefore 1.3.1
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | minizip | before 1.1-8+deb10u1 | 1.1-8+deb10u1 |
| Debian:12 | minizip | before 1.1-8+deb12u1 | 1.1-8+deb12u1 |
| Debian:12 | zlib | from 0 | — |
| Debian:13 | zlib | before 1:1.3.dfsg-2 | 1:1.3.dfsg-2 |
| openSUSE:Leap 15.5 | zlib | before 1.2.13-150500.4.3.1 | 1.2.13-150500.4.3.1 |
| openSUSE:Leap 16.0 | zlib | before 1.2.13-160000.3.1 | 1.2.13-160000.3.1 |
| openSUSE:Leap Micro 5.3 | zlib | before 1.2.11-150000.3.48.1 | 1.2.11-150000.3.48.1 |
| openSUSE:Tumbleweed | grype | before 0.88.0-1.1 | 0.88.0-1.1 |
| PyPI | pyminizip | up to and including 0.2.6 | — |
| SUSE:Linux Enterprise Micro 5.3 | zlib | before 1.2.11-150000.3.48.1 | 1.2.11-150000.3.48.1 |
| SUSE:Linux Enterprise Micro 5.5 | zlib | before 1.2.13-150500.4.3.1 | 1.2.13-150500.4.3.1 |
| SUSE:Linux Enterprise Software Development Kit 12 SP5 | zlib | before 1.2.11-11.37.1 | 1.2.11-11.37.1 |
| SUSE:Linux Micro 6.0 | zlib | before 1.2.13-7.1 | 1.2.13-7.1 |
| SUSE:Linux Micro 6.1 | zlib | before 1.2.13-slfo.1.1_2.1 | 1.2.13-slfo.1.1_2.1 |
| SUSE:Linux Micro 6.2 | zlib | before 1.2.13-160000.3.1 | 1.2.13-160000.3.1 |
Same product
zlib: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-25032zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.46Plan
- CVE-2022-37434zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field.45Plan
- CVE-2002-0059The decompression algorithm in zlib 1.1.3 and earlier, as used in many different utilities and packages, causes inflateEnd to release certai42Plan
Published before and after this one in the same product
- ← EarlierCVE-2016-9840May 23, 2017 · inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.36Monitor
- ← EarlierCVE-2016-9841May 23, 2017 · inffast.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.41Plan
- Later →CVE-2026-22184Jan 7, 2026 · zlib <= 1.3.1.2 untgz Global Buffer Overflow in TGZfname()18Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:zlib | 0 · Alpine:v3.15 | Package registry (OSV) |
| debian:minizip | 1.1-8+deb12u1 · Debian:12 | Package registry (OSV) |
| debian:zlib | 1:1.3.dfsg-2 · Debian:13 | Package registry (OSV) |
| opensuse:grype | 0.88.0-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:zlib | 1.2.13-150500.4.3.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| suse:zlib | 1.2.13-150500.4.3.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-190 · Integer Overflow or WraparoundCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (13 more)Show less
- www.openwall.com/lists/oss-security/2024/01/24/10
- chromium.googlesource.com/chromium/src/+/d709fb23806858847131027da95ef4c548813356
- chromium.googlesource.com/chromium/src/+/de29dd6c7151d3cd37cb4cf0036800ddfb1d8b61
- github.com/madler/zlib/blob/ac8f12c97d1afd9bafa9c710f827d40a407d3266/contrib/README.contrib#L1-L4
- github.com/madler/zlib/pull/843
- lists.debian.org/debian-lts-announce/2023/11/msg00026.html
- pypi.org/project/pyminizip/#history
- security.gentoo.org/glsa/202401-18
- security.netapp.com/advisory/ntap-20231130-0009/
- www.winimage.com/zLibDll/minizip.html
- cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.com/productcert/html/ssa-470355.html
- cert-portal.siemens.com/productcert/html/ssa-769027.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.