HIGH
CVE-2018-25032
CWE-787Published: March 25, 2022· Updated: Jul 14, 2026
7.5
CVSS v3.1
Official Description
zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.
Technical Analysis
CVE-2018-25032 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Apple2 product(s)
mac os xmacos
azul1 product(s)
zulu
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
goto1 product(s)
gotoassist
mariadb1 product(s)
mariadb
Microsoft1 product(s)
windows
netapp16 product(s)
active iq unified managere-series santricity os controllermanagement services for element softwareoncommand workflow automationontap select deploy administration utilityhci compute nodeh300s firmwareh300sh500s firmwareh500sh700s firmwareh700s+4
nokogiri1 product(s)
nokogiri
Python1 product(s)
python
siemens12 product(s)
scalance sc622-2c firmwarescalance sc622-2cscalance sc626-2c firmwarescalance sc626-2cscalance sc632-2c firmwarescalance sc632-2cscalance sc636-2c firmwarescalance sc636-2cscalance sc642-2c firmwarescalance sc642-2cscalance sc646-2c firmwarescalance sc646-2c
zlib1 product(s)
zlib
Source: NVD CPE · 50 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (64)
→
http://seclists.org/fulldisclosure/2022/May/33Mailing List · Third Party Advisory
→
http://seclists.org/fulldisclosure/2022/May/35Mailing List · Third Party Advisory
→
http://seclists.org/fulldisclosure/2022/May/38Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2022/03/25/2Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2022/03/26/1Exploit · Mailing List · Third Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-333517.pdfThird Party Advisory
→
https://github.com/madler/zlib/commit/5c44459c3b28a9bd3283aaceab7c615f8020c531Patch · Third Party Advisory
→
https://github.com/madler/zlib/compare/v1.2.11...v1.2.12Patch · Third Party Advisory
→
https://github.com/madler/zlib/issues/605Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/04/msg00000.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/05/msg00008.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/09/msg00023.htmlMailing List · Third Party Advisory
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Quick Facts
CVE IDCVE-2018-25032
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-787
CISA KEVNo
Affected12 vendor(s)
PublishedMar 25, 2022
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-25032 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.