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CVE-2022-37434
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.…
Critical9.8Public exploitEPSS 19.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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).
Public exploit
A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
- https://github.com/curl/curl/issues/9271 (opens in a new tab)x_transferredexploit
Timeline
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 19.2% · top 2.6% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- unknown n/a
References (32)
- https://github.com/ivd38/zlib_overflow (opens in a new tab)x_transferred
- https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1 (opens in a new tab)x_transferred
- https://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063 (opens in a new tab)x_transferred
- https://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764 (opens in a new tab)x_transferred
- [oss-security] 20220805 zlib buffer overflow (opens in a new tab)mailing-listx_transferred
- https://github.com/curl/curl/issues/9271 (opens in a new tab)x_transferredexploit
- [oss-security] 20220808 Re: zlib buffer overflow (opens in a new tab)mailing-listx_transferred
- FEDORA-2022-25e4dbedf9 (opens in a new tab)vendor-advisoryx_transferred
- DSA-5218 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-15da0cf165 (opens in a new tab)vendor-advisoryx_transferred
- https://security.netapp.com/advisory/ntap-20220901-0005/ (opens in a new tab)x_transferred
- FEDORA-2022-b8232d1cca (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20220912 [SECURITY] [DLA 3103-1] zlib security update (opens in a new tab)mailing-listx_transferred
- FEDORA-2022-3c28ae0cd8 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-0b517a5397 (opens in a new tab)vendor-advisoryx_transferred
- https://support.apple.com/kb/HT213489 (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213488 (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213494 (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213493 (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213491 (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213490 (opens in a new tab)x_transferred
- 20221030 APPLE-SA-2022-10-27-5 Additional information for APPLE-SA-2022-10-24-2 macOS Ventura 13 (opens in a new tab)mailing-listx_transferred
- 20221030 APPLE-SA-2022-10-27-2 Additional information for APPLE-SA-2022-10-24-1 iOS 16.1 and iPadOS 16 (opens in a new tab)mailing-listx_transferred
- 20221030 APPLE-SA-2022-10-27-1 iOS 15.7.1 and iPadOS 15.7.1 (opens in a new tab)mailing-listx_transferred
- 20221030 APPLE-SA-2022-10-27-6 Additional information for APPLE-SA-2022-10-24-3 macOS Monterey 12.6.1 (opens in a new tab)mailing-listx_transferred
- https://security.netapp.com/advisory/ntap-20230427-0007/ (opens in a new tab)x_transferred
- https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-561322.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-150063.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-202008.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-470355.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-37434)Record last updated .