HOME VULNERABILITIESCVE-2022-37434

CRITICAL

CVE-2022-37434

CWE-787Published: August 5, 2022· Updated: Jul 14, 2026

9.8

CVSS v3.1

Official Description

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).

Technical Analysis

CVE-2022-37434 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

Apple4 product(s)

ipadosiphone osmacoswatchos

Debian1 product(s)

debian linux

Fedora1 product(s)

fedora

netapp13 product(s)

active iq unified managerhcimanagement services for element softwareoncommand workflow automationontap select deploy administration utilitystoragegridhci compute nodeh300s firmwareh300sh500s firmwareh500sh700s firmware+1

stormshield1 product(s)

stormshield network security

zlib1 product(s)

zlib

Source: NVD CPE · 23 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2022/08/09/1

PATCHhttps://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

PATCHhttp://www.openwall.com/lists/oss-security/2022/08/09/1

PATCHhttps://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/37

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/38

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/41

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/42

ADVISORYhttp://www.openwall.com/lists/oss-security/2022/08/05/2

ADVISORYhttps://github.com/curl/curl/issues/9271

ADVISORYhttps://github.com/ivd38/zlib_overflow

ADVISORYhttps://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063

ADVISORYhttps://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764

ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/09/msg00012.html

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWN4VE3JQR4O2SOUS5TXNLANRPMHWV4I/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMBOJ77A7T7PQCARMDUK75TE6LLESZ3O/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAVPQNCG3XRLCLNSQRM3KAN5ZFMVXVTY/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5U7OTKZSHY2I3ZFJSR2SHFHW72RKGDK/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YRQAI7H4M4RQZ2IWZUEEXECBE5D56BH2/

ADVISORYhttps://security.netapp.com/advisory/ntap-20220901-0005/

ADVISORYhttps://security.netapp.com/advisory/ntap-20230427-0007/

ADVISORYhttps://support.apple.com/kb/HT213488

ADVISORYhttps://support.apple.com/kb/HT213489

ADVISORYhttps://support.apple.com/kb/HT213490

ADVISORYhttps://support.apple.com/kb/HT213491

ADVISORYhttps://support.apple.com/kb/HT213493

ADVISORYhttps://support.apple.com/kb/HT213494

ADVISORYhttps://www.debian.org/security/2022/dsa-5218

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/37

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/38

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/41

ADVISORYhttp://seclists.org/fulldisclosure/2022/Oct/42

ADVISORYhttp://www.openwall.com/lists/oss-security/2022/08/05/2

ADVISORYhttps://github.com/curl/curl/issues/9271

ADVISORYhttps://github.com/ivd38/zlib_overflow

ADVISORYhttps://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063

ADVISORYhttps://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764

ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/09/msg00012.html

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWN4VE3JQR4O2SOUS5TXNLANRPMHWV4I/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMBOJ77A7T7PQCARMDUK75TE6LLESZ3O/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAVPQNCG3XRLCLNSQRM3KAN5ZFMVXVTY/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5U7OTKZSHY2I3ZFJSR2SHFHW72RKGDK/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YRQAI7H4M4RQZ2IWZUEEXECBE5D56BH2/

ADVISORYhttps://security.netapp.com/advisory/ntap-20220901-0005/

ADVISORYhttps://security.netapp.com/advisory/ntap-20230427-0007/

ADVISORYhttps://support.apple.com/kb/HT213488

ADVISORYhttps://support.apple.com/kb/HT213489

ADVISORYhttps://support.apple.com/kb/HT213490

ADVISORYhttps://support.apple.com/kb/HT213491

ADVISORYhttps://support.apple.com/kb/HT213493

ADVISORYhttps://support.apple.com/kb/HT213494

ADVISORYhttps://www.debian.org/security/2022/dsa-5218

ADVISORYhttps://github.com/curl/curl/issues/9271

All References (59)

→

http://seclists.org/fulldisclosure/2022/Oct/37Mailing List · Third Party Advisory

→

http://seclists.org/fulldisclosure/2022/Oct/38Mailing List · Third Party Advisory

→

http://seclists.org/fulldisclosure/2022/Oct/41Mailing List · Third Party Advisory

→

http://seclists.org/fulldisclosure/2022/Oct/42Mailing List · Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2022/08/05/2Mailing List · Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2022/08/09/1Mailing List · Patch · Third Party Advisory

→

https://github.com/curl/curl/issues/9271Exploit · Issue Tracking · Third Party Advisory

→

https://github.com/ivd38/zlib_overflowExploit · Third Party Advisory

→

https://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063Exploit · Third Party Advisory

→

https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d

→

https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1Patch · Third Party Advisory

→

https://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764Exploit · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2022/09/msg00012.htmlMailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWN4VE3JQR4O2SOUS5TXNLANRPMHWV4I/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMBOJ77A7T7PQCARMDUK75TE6LLESZ3O/Mailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2022-37434

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-787

CISA KEVNo

Affected6 vendor(s)

PublishedAug 5, 2022

Related CVEs (CWE-787)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2022-37434 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.COM. CVE data is provided under the NVD usage policy.

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