STIG ID: IIST-SV-000220 | SRG: SRG-APP-000141-WSR-000015 | Severity: medium | CCI: | Vulnerability Id: V-268325
Security scans show Request Smuggling vulnerability on IIS server.
The vulnerability allows a remote attacker to perform HTTP request smuggling attack.
The vulnerability exists due to the way that HTTP proxies (front-end) and web servers (back-end) that do not strictly adhere to RFC standards handle sequences of HTTP requests received from multiple sources. A remote attacker can send a specially crafted request to a targeted IIS Server, perform HTTP request smuggling attack and modify responses or retrieve information from another user's HTTP session.
Navigate to "HKLM\System\CurrentControlSet\Services\HTTP\Parameters".
Create REG_DWORD "DisableRequestSmuggling” and set it to "1".
Note: This can be performed multiple ways; this is an example.
Open Registry Editor.
Navigate to "HKLM\System\CurrentControlSet\Services\HTTP\Parameters"
Verify "DisableRequestSmuggling” is set to "1".
If REG_DWORD DisableRequestSmuggling is not set to 1, this is a finding.