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.
References
Link | Resource |
---|---|
https://lists.debian.org/debian-lts-announce/2022/05/msg00042.html | Mailing List Third Party Advisory |
https://www.debian.org/security/2021/dsa-5023 | Third Party Advisory |
https://www.oracle.com/security-alerts/cpuapr2022.html | Patch Third Party Advisory |
https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-cve-2021-42717/ | Exploit Mitigation Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: mitre
Published: 2021-12-07T21:08:28
Updated: 2022-05-28T09:06:09
Reserved: 2021-10-19T00:00:00
Link: CVE-2021-42717
JSON object: View
NVD Information
Status : Analyzed
Published: 2021-12-07T22:15:06.950
Modified: 2022-09-03T03:33:10.373
Link: CVE-2021-42717
JSON object: View
Redhat Information
No data.
CWE