CVE-2021-40438 — Apache HTTP Server-Side Request Forgery (SSRF)
CVE-2021-40438: Apache HTTP Server-Side Request Forgery (SSRF)
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Apache |
| Product | Apache |
| Date added | 2021-12-01 |
| Due date | 2021-12-15 |
| Ransomware campaign use | Known |
Description
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-40438
Weakness behind it
CISA records this vulnerability as an instance of CWE-918. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40438
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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