CVE-2016-6311
Description
It was found that when issuing a GET request which results in a 302 redirect, and when the request header 'Host' field was not set, the response header field 'Location' contains the internal IP address of the server. An attacker could use this disclose information which they are not authorized to access.
Mitigation
You can add a filter in the JBoss CLI that sets the host header to the 'myvirtualhost.com' if the host header is not present. eg:
/subsystem=undertow/configuration=filter/expression-filter=hostname:add(expression="header(header=Host, value=myvirtualhost.com)")
/subsystem=undertow/server=default-server/host=default-host/filter-ref=hostname:add(predicate="not exists(%{i,Host})")
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 | 5.3 | 5.3 | 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 | Low | Low | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5 | 5 | N/A |
| Attack Vector | Network | Network | N/A |
| Access Complexity | Low | Low | N/A |
| Authentication | None | None | N/A |
| Confidentiality Impact | Partial | Partial | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: AV:N/AC:L/Au:N/C:P/I:N/A:N
NVD: AV:N/AC:L/Au:N/C:P/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Acknowledgements
Red Hat would like to thank Luca Bueti for reporting this issue. Upstream acknowledges WildFly as the original reporter.
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