CVE-2022-2880
Description
A flaw was found in the golang package, where requests forwarded by reverse proxy include the raw query parameters from the inbound request, including unparseable parameters rejected by net/http. This issue could permit query parameter smuggling when a Go proxy forwards a parameter with an unparseable value. After the fix, the reverse proxy sanitizes the query parameters in the forwarded query when the outbound request's form field is set after the reverse proxy. The director function returns, indicating that the proxy has parsed the query parameters. Proxies that do not parse query parameters continue to forward the original query parameters unchanged.
Statement
The opportunity to exploit this vulnerability is limited to the Golang runtime. In the case of the OpenShift Container Platform, this would be restricted within each individual container. There are multiple layers of guide rails (Golang’s Garbage Collector; OpenShift’s resource constraints imposed at the container and cluster levels) which would require a malicious user to continue submitting attacks for there to be any enduring impact.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Understanding the Weakness (CWE)
Integrity,Non-Repudiation,Access Control
Technical Impact: Unexpected State; Hide Activities; Bypass Protection Mechanism
An attacker could create HTTP messages to exploit a number of weaknesses including 1) the message can trick the web server to associate a URL with another URL's webpage and caching the contents of the webpage (web cache poisoning attack), 2) the message can be structured to bypass the firewall protection mechanisms and gain unauthorized access to a web application, and 3) the message can invoke a script or a page that returns client credentials (similar to a Cross Site Scripting attack).
Acknowledgements
Red Hat would like to thank Daniel Abeles (Head of Research, Oxeye) and Gal Goldstein (Security Researcher, Oxeye) for reporting this issue.
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