CVE-2021-40438
mod_proxy SSRF
Apache HTTP Server-Side Request Forgery (SSRF) is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2021-40438
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.
Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HAffected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache Software Foundation | Apache HTTP Server | Apache HTTP Server 2.4 to 2.4.48 |
References
19 Links- [httpd-users] 20210923 [users@httpd] 2.4.49 security fixes: more info
- [httpd-users] 20210923 Re: [users@httpd] 2.4.49 security fixes: more info
- [httpd-users] 20210923 [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info
- [httpd-users] 20210923 Re: [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info
- [debian-lts-announce] 20211002 [SECURITY] [DLA 2776-1] apache2 security update
- [httpd-bugs] 20211008 [Bug 65616] CVE-2021-36160 regression
- [httpd-users] 20211019 [users@httpd] Regarding CVE-2021-40438
- [httpd-users] 20211019 Re: [users@httpd] Regarding CVE-2021-40438
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.tenable.com/security/tns-2021-17
- https://security.netapp.com/advisory/ntap-20211008-0004/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
Record Details
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Related Tool Categories
Tool categories that test for or protect against this vulnerability class.
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