It was discovered that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other then their own.
Find out more about CVE-2016-6816 from the MITRE CVE dictionary dictionary and NIST NVD.
Applying the fix provided to mitigate this issue may cause Tomcat to return 400 status after updating. For more information, refer to https://access.redhat.com/solutions/2891171
| Base Score | 5.8 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | None |
| CVSS3 Base Score | 6.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 6 (tomcat6) | RHSA-2017:0527 | 2017-03-15 |
| Red Hat JBoss Web Server 3.1 for RHEL 6 | RHSA-2017:0455 | 2017-03-07 |
| Red Hat JBoss Enterprise Application Platform 6 for RHEL 6 Server (jboss-ec2-eap) | RHSA-2017:0250 | 2017-02-02 |
| Red Hat JBoss Enterprise Application Platform 6 for RHEL 6 Server (jbossweb) | RHSA-2017:0244 | 2017-02-02 |
| Red Hat JBoss Enterprise Application Platform 6 for RHEL 5 Server (jbossweb) | RHSA-2017:0246 | 2017-02-02 |
| Red Hat JBoss Web Server 3.1 | RHSA-2017:0457 | 2017-03-07 |
| Red Hat JBoss Web Server 3.1 for RHEL 7 | RHSA-2017:0456 | 2017-03-07 |
| Red Hat JBoss Enterprise Application Platform 6.4 | RHSA-2017:0247 | 2017-02-02 |
| Red Hat Enterprise Linux 7 (tomcat) | RHSA-2017:0935 | 2017-04-12 |
| Red Hat JBoss Enterprise Application Platform 6.3 for RHEL 7 Server (jbossweb) | RHSA-2017:0245 | 2017-02-02 |
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-java-common-tomcat | Not affected |
| Red Hat JBoss Web Server 3.0 | tomcat7 | Fix deferred |
| Red Hat JBoss Web Server 3.0 | tomcat8 | Fix deferred |
| Red Hat JBoss Portal Platform 6 | jbossweb | Will not fix |
| Red Hat JBoss Operations Network 3 | Core Server | Will not fix |
| Red Hat JBoss Fuse 6 | jbossweb | Will not fix |
| Red Hat JBoss EWS 2 | tomcat7 | Will not fix |
| Red Hat JBoss EWS 2 | tomcat6 | Will not fix |
| Red Hat JBoss EAP 5 | jbossweb | Will not fix |
| Red Hat JBoss Data Virtualization 6 | jbossweb | Will not fix |
| Red Hat JBoss Data Grid 6 | jbossweb | Will not fix |
| Red Hat Enterprise Linux 5 | tomcat5 | Will not fix |
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