Skip to content
Fencer Vulns
critical 9.8

CVE-2022-37434 in the critical feed json

zlib 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.

published 2022-08-05 4 y ago modified 2026-10-14 25 d ago also EUVD-2022-40062 , JLSEC-2026-478

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
19.2%
EPSS 19.2% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

zlib 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. NOTE: only applications that call inflateGetHeader are affected. Some common applications bundle the affected zlib source code but may be unable to call inflateGetHeader (e.g., see the nodejs/node reference).

Patch / fix

  • julia Openresty_jll 1.27.1+0
  • julia Zlib_jll 1.2.13+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens RUGGEDCOM ROX MX5000 V2.17.0
  • Siemens RUGGEDCOM ROX MX5000RE V2.17.0
  • Siemens RUGGEDCOM ROX RX1400 V2.17.0
  • Siemens RUGGEDCOM ROX RX1500 V2.17.0
  • Siemens RUGGEDCOM ROX RX1501 V2.17.0
  • Siemens RUGGEDCOM ROX RX1510 V2.17.0
  • Siemens RUGGEDCOM ROX RX1511 V2.17.0
  • Siemens RUGGEDCOM ROX RX1512 V2.17.0
  • Siemens RUGGEDCOM ROX RX1524 V2.17.0
  • Siemens RUGGEDCOM ROX RX1536 V2.17.0
  • Siemens RUGGEDCOM ROX RX5000 V2.17.0
  • zlib Debian 14, Debian 13, Debian 12 1:1.2.11.dfsg-4.1
  • libz-mingw-w64 Debian 14, Debian 13, Debian 12 1.2.12+dfsg-2

debian advisories DEBIAN-CVE-2022-37434

  • zlib Ubuntu 18.04 LTS 1:1.2.11.dfsg-0ubuntu2.2
  • zlib Ubuntu 20.04 LTS 1:1.2.11.dfsg-2ubuntu1.5
  • zlib Ubuntu 22.04 LTS 1:1.2.11.dfsg-2ubuntu9.2
  • klibc Ubuntu 20.04 LTS 2.0.7-1ubuntu5.2
  • klibc Ubuntu 22.04 LTS 2.0.10-4ubuntu0.1
  • klibc Ubuntu 24.04 LTS 2.0.13-4ubuntu0.1
  • rsync Ubuntu 18.04 LTS 3.1.2-2.1ubuntu1.5
  • rsync Ubuntu 20.04 LTS 3.1.3-8ubuntu0.4

ubuntu advisories UBUNTU-CVE-2022-37434

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • zlib RHEL 7 1.2.7-21.el7_9
  • minizip RHEL 7 1.2.7-21.el7_9
  • rsync RHEL 9 3.2.3-18.el9
  • rsync-daemon RHEL 9 3.2.3-18.el9
  • rsync RHEL 8 3.1.3-19.el8
  • rsync-daemon RHEL 8 3.1.3-19.el8
  • zlib RHEL 9 1.2.11-32.el9_0
  • zlib RHEL 8 1.2.11-19.el8_6

red hat advisories RHSA-2024:0254RHSA-2023:1095RHSA-2022:8291RHSA-2022:7793RHSA-2022:7314RHSA-2022:7106

  • zlib SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +24 more 1.2.11-150000.3.33.1
  • zlib SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.2.11-11.22.1
  • zlib SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 1.2.11-3.9.1
  • zlib SLES 12 SP3-BCL, SLES 12 SP2-BCL 1.2.8-12.9.1

suse advisories SUSE-SU-2022:2947-1SUSE-SU-2022:2847-1SUSE-SU-2022:2846-1SUSE-SU-2022:2845-1

  • rusty_v8 openSUSE Tumbleweed 0.106.0-1.1
  • rsync openSUSE Tumbleweed 3.2.5-1.1
  • libqt5-qtbase openSUSE Tumbleweed 5.15.6+kde177-1.1
  • vlc openSUSE Tumbleweed 3.0.19-1.1
  • vlc Package Hub 15 SP5, openSUSE Leap 15.5 3.0.20-bp155.2.3.1
  • vlc Package Hub 15 SP4, openSUSE Leap 15.4 3.0.20-bp154.2.6.1
  • zlib openSUSE Leap Micro 5.2 1.2.11-150000.3.33.1

opensuse advisories openSUSE-SU-2024:14386-1openSUSE-SU-2024:12270-1openSUSE-SU-2024:12367-1openSUSE-SU-2024:13367-1openSUSE-SU-2023:0366-1openSUSE-SU-2023:0365-1

  • rsync AlmaLinux 9 3.2.3-18.el9
  • rsync-daemon AlmaLinux 9 3.2.3-18.el9
  • rsync AlmaLinux 8 3.1.3-19.el8
  • rsync-daemon AlmaLinux 8 3.1.3-19.el8
  • zlib AlmaLinux 9 1.2.11-32.el9_0
  • zlib AlmaLinux 8 1.2.11-19.el8_6

almalinux advisories ALSA-2022:8291ALSA-2022:7793ALSA-2022:7314ALSA-2022:7106

  • rsync Rocky Linux 9 3.2.3-18.el9
  • rsync Rocky Linux 8 3.1.3-19.el8
  • zlib Rocky Linux 9 1.2.11-32.el9_0
  • zlib Rocky Linux 8 1.2.11-19.el8_6

rocky linux advisories RLSA-2022:8291RLSA-2022:7793RLSA-2022:7314RLSA-2022:7106

  • zlib Alpine 3.11 1.2.11-r4
  • zlib Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 1.2.12-r2
  • zlib-ng Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 2.0.6-r0

alpine advisories ALPINE-CVE-2022-37434

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • zlib CBL-Mariner 2.0 1.2.12-2
  • crash Azure Linux 3.0 8.0.4-2
  • cloud-hypervisor-cvm Azure Linux 3.0 38.0.72.2-1
  • teckit Azure Linux 3.0 2.5.12-4

azure linux advisories AZL-10470AZL-41380AZL-42760AZL-44769

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • zlib Arch Linux 1:1.2.12-3

arch linux advisories AVG-2821

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-37434 updated cvss 7.0

zlib: heap-based buffer over-read and overflow in inflate() in inflate.c via a large gzip header extra field

  • Red Hat build of Quarkus rocksdbjni
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 6 zlib, minizip
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 9) zlib-static 1.2.11-32.el9_0, zlib-debuginfo 1.2.11-32.el9_0, zlib-debugsource 1.2.11-32.el9_0, minizip-compat-debuginfo 1.2.11-32.el9_0 Red Hat Enterprise Linux AppStream (v. 9) rsync-daemon 3.2.3-18.el9
    fixed: vendor fix RHSA-2022:7314
  • Red Hat Enterprise Linux BaseOS (v. 8) rsync 3.1.3-19.el8, zlib 1.2.11-19.el8_6, rsync-daemon 3.1.3-19.el8
    fixed: vendor fix RHSA-2022:7106
  • Red Hat Enterprise Linux BaseOS (v. 9) rsync 3.2.3-18.el9, zlib 1.2.11-32.el9_0
    fixed: vendor fix RHSA-2022:7314
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) rsync 3.1.3-14.el8_6.5, rsync-daemon 3.1.3-14.el8_6.5
    fixed: vendor fix RHSA-2024:0254
  • Red Hat Enterprise Linux Client (v. 7) zlib 1.2.7-21.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) minizip 1.2.7-21.el7_9 Red Hat Enterprise Linux ComputeNode Optional (v. 7) minizip 1.2.7-21.el7_9
    fixed: vendor fix RHSA-2023:1095
  • Red Hat Enterprise Linux CRB (v. 8) zlib-static 1.2.11-19.el8_6, zlib-debuginfo 1.2.11-19.el8_6, zlib-debugsource 1.2.11-19.el8_6
    fixed: vendor fix RHSA-2022:7106
show 2 more
  • Red Hat Enterprise Linux Server (v. 7) zlib 1.2.7-21.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) minizip 1.2.7-21.el7_9 Red Hat Enterprise Linux Workstation (v. 7) zlib 1.2.7-21.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) minizip 1.2.7-21.el7_9
    fixed: vendor fix RHSA-2023:1095
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2022:8841

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-26-202-06 updated cvss 9.8

Siemens CADRA

  • Siemens CADRA < 2511
    affected: fixed in V2511

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-23-348-10 updated cvss 9.8

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-23-194-04 updated cvss 9.8

Siemens SIMATIC MV500 Devices

  • Siemens SIMATIC MV540 H (6GF3540-0GE10) <V3.3.4 Siemens SIMATIC MV540 S (6GF3540-0CD10) <V3.3.4 Siemens SIMATIC MV550 H (6GF3550-0GE10) <V3.3.4 Siemens SIMATIC MV550 S (6GF3550-0CD10) <V3.3.4 Siemens SIMATIC MV560 U (6GF3560-0LE10) <V3.3.4 Siemens SIMATIC MV560 X (6GF3560-0HE10) <V3.3.4
    affected: fixed in V3.3.4 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-105-08 updated cvss 8.8

ABB M2M Gateway

  • ABB M2M Gateway >=4.1.2, <=5.0.3, >=5.0.1, <=5.0.3
    affected: mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-23-005-03 updated cvss 7.5

Hitachi Energy Lumada Asset Performance Management

  • Hitachi Energy Lumada APM 6.5.0.0, >= 6.1.0.0, <= 6.4.0.0 (CVE-2022-37434 only)
    affected: mitigation “For all listed vulnerabilities: Lumada APM Version 6.5.0.1 or later.” search.abb.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

19.24% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/curl/curl/issues/9271 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/ivd38/zlib_overflow referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia GCCBootstrap_jll
all versions
 no fix listed
julia Openresty_jll
<1.27.1+0
1.27.1+0
julia Zlib_jll
<1.2.13+0
1.2.13+0

Affected products

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens RUGGEDCOM ROX MX5000
  • Siemens RUGGEDCOM ROX MX5000RE
  • Siemens RUGGEDCOM ROX RX1400
  • Siemens RUGGEDCOM ROX RX1500
  • Siemens RUGGEDCOM ROX RX1501
  • Siemens RUGGEDCOM ROX RX1510
  • Siemens RUGGEDCOM ROX RX1511
  • Siemens RUGGEDCOM ROX RX1512
  • Siemens RUGGEDCOM ROX RX1524
  • Siemens RUGGEDCOM ROX RX1536
  • Siemens RUGGEDCOM ROX RX5000

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input
  • CWE-787 Out-of-bounds Write

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.