CVE-2018-25032

Name: CVE-2018-25032
Creator: NVD / NIST
Published: 2022-03-25T09:15:08.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 51.73%

Last modified Jun 17, 2026

CVE-2018-25032 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.. EPSS estimates a 51.73% chance of exploitation in the next 30 days.

Description

zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

51.73%

98.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nokogiri	Nokogiri	< 1.13.4
Python	Python	>= 3.7.0, < 3.7.14
Python	Python	>= 3.8.0, < 3.8.14
Python	Python	>= 3.9.0, < 3.9.13
Python	Python	>= 3.10.0, < 3.10.5
Zlib	Zlib	>= 1.2.2.2, < 1.2.12
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0
Fedoraproject	Fedora	34
Fedoraproject	Fedora	35
Fedoraproject	Fedora	36
Apple	Mac Os X	>= 10.15, < 10.15.7
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.6.6
Apple	Macos	>= 12.0.0, < 12.4
Mariadb	Mariadb	>= 10.3.0, < 10.3.36
Mariadb	Mariadb	>= 10.4.0, < 10.4.26
Mariadb	Mariadb	>= 10.5.0, < 10.5.17
Mariadb	Mariadb	>= 10.6.0, < 10.6.9
Mariadb	Mariadb	>= 10.7.0, < 10.7.5
Mariadb	Mariadb	>= 10.8.0, < 10.8.4
Mariadb	Mariadb	>= 10.9.0, < 10.9.2
Netapp	Active Iq Unified Manager	All versions
Netapp	E-Series Santricity Os Controller	>= 11.0.0, <= 11.70.2
Netapp	Management Services For Element Software	All versions
Netapp	Oncommand Workflow Automation	All versions
Netapp	Ontap Select Deploy Administration Utility	All versions
Netapp	Hci Compute Node	All versions
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H410s Firmware	All versions
Netapp	H410c Firmware	All versions
Siemens	Scalance Sc622-2c Firmware	< 3.0
Siemens	Scalance Sc626-2c Firmware	< 3.0
Siemens	Scalance Sc632-2c Firmware	< 3.0
Siemens	Scalance Sc636-2c Firmware	< 3.0
Siemens	Scalance Sc642-2c Firmware	< 3.0
Siemens	Scalance Sc646-2c Firmware	< 3.0
Azul	Zulu	6.45
Azul	Zulu	7.52
Azul	Zulu	8.60
Azul	Zulu	11.54
Azul	Zulu	13.46
Azul	Zulu	15.38
Azul	Zulu	17.32
Goto	Gotoassist	< 11.9.18

References

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
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCZFIJBJTZ7CL5QXBFKTQ22Q26VINRUF/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DF62MVMH3QUGMBDCB3DY2ERQ6EBHTADB/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZZPTWRYQULAOL3AW7RZJNVZ2UONXCV4/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NS2D2GFPFGOJUL4WQ3DUAY7HF4VWQ77F/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VOKNP2L734AEL47NRYGVZIKEFOUBQY5Y/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOKFMSNQ5D5WGMALBNBXU3GE442V74WU/Third Party Advisory
https://security.gentoo.org/glsa/202210-42Third Party Advisory
https://security.netapp.com/advisory/ntap-20220526-0009/Third Party Advisory
https://security.netapp.com/advisory/ntap-20220729-0004/Third Party Advisory
https://support.apple.com/kb/HT213255Third Party Advisory
https://support.apple.com/kb/HT213256Third Party Advisory
https://support.apple.com/kb/HT213257Third Party Advisory
https://www.debian.org/security/2022/dsa-5111Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/24/1Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/28/1Exploit, Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/28/3Mailing List, Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
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
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCZFIJBJTZ7CL5QXBFKTQ22Q26VINRUF/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DF62MVMH3QUGMBDCB3DY2ERQ6EBHTADB/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZZPTWRYQULAOL3AW7RZJNVZ2UONXCV4/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NS2D2GFPFGOJUL4WQ3DUAY7HF4VWQ77F/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VOKNP2L734AEL47NRYGVZIKEFOUBQY5Y/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOKFMSNQ5D5WGMALBNBXU3GE442V74WU/Third Party Advisory
https://security.gentoo.org/glsa/202210-42Third Party Advisory
https://security.netapp.com/advisory/ntap-20220526-0009/Third Party Advisory
https://security.netapp.com/advisory/ntap-20220729-0004/Third Party Advisory
https://support.apple.com/kb/HT213255Third Party Advisory
https://support.apple.com/kb/HT213256Third Party Advisory
https://support.apple.com/kb/HT213257Third Party Advisory
https://www.debian.org/security/2022/dsa-5111Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/24/1Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/28/1Exploit, Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/28/3Mailing List, Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory

Timeline

Published: Mar 25, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-25032?

zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.

How severe is CVE-2018-25032?

CVE-2018-25032 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 51.73% probability of exploitation in the next 30 days.

How do I fix CVE-2018-25032?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-25032?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST