CVE-2021-42717
- Source
- https://cve.org/CVERecord?id=CVE-2021-42717
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-42717.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-42717
- Aliases
- Downstream
- Related
- Published
- 2021-12-07T22:15:06.950Z
- Modified
- 2026-04-11T12:38:13.015168Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.
- Database specific
{ "unresolved_ranges": [ { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "r24" } ], "cpe": "cpe:2.3:a:f5:nginx_modsecurity_waf:r24:*:*:*:*:*:*:*" }, { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "r25" } ], "cpe": "cpe:2.3:a:f5:nginx_modsecurity_waf:r25:*:*:*:*:*:*:*" }, { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "12.2.1.3.0" } ], "cpe": "cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*" }, { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "12.2.1.4.0" } ], "cpe": "cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*" }, { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "8.8" } ], "cpe": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*" }, { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "10.0" } ], "cpe": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*" }, { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "11.0" } ], "cpe": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*" }, { "source": "CPE_FIELD", "extracted_events": [ { "last_affected": "9.0" } ], "cpe": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*" } ] }- References
Affected packages
Git / github.com/owasp-modsecurity/modsecurity
Affected ranges
- Type
- GIT
- Repo
- https://github.com/owasp-modsecurity/modsecurity
- Events
-
IntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "source": "CPE_FIELD", "extracted_events": [ { "introduced": "3.0.0" }, { "fixed": "3.0.6" }, { "introduced": "2.0.0" }, { "fixed": "2.9.5" } ], "cpe": [ "cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:*", "cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*" ] }