DescriptionPuma is a HTTP 1.1 server for Ruby/Rack applications. Prior to versions 5.5.1 and 4.3.9, using `puma` with a proxy which forwards HTTP header values which contain the LF character could allow HTTP request smugggling. A client could smuggle a request through a proxy, causing the proxy to send a response back to another unknown client. The only proxy which has this behavior, as far as the Puma team is aware of, is Apache Traffic Server. If the proxy uses persistent connections and the client adds another request in via HTTP pipelining, the proxy may mistake it as the first request's body. Puma, however, would see it as two requests, and when processing the second request, send back a response that the proxy does not expect. If the proxy has reused the persistent connection to Puma to send another request for a different client, the second response from the first client will be sent to the second client. This vulnerability was patched in Puma 5.5.1 and 4.3.9. As a workaround, do not use Apache Traffic Server with `puma`.
Overall state of this security issue: Running
This issue is currently rated as having low severity.
|National Vulnerability Database||SUSE|
- SUSE-SU-2021:3728-1, published Fri Nov 19 17:25:06 UTC 2021
- SUSE-SU-2021:3729-1, published Fri Nov 19 17:23:19 UTC 2021
List of released packages
|Product(s)||Fixed package version(s)||References|
|HPE Helion Openstack 8|| ||Patchnames: |
|SUSE OpenStack Cloud 8|| ||Patchnames: |
|SUSE OpenStack Cloud 9|| ||Patchnames: |
|SUSE OpenStack Cloud Crowbar 8|| ||Patchnames: |
|SUSE OpenStack Cloud Crowbar 9|| ||Patchnames: |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
|SUSE Linux Enterprise High Availability Extension 15||rubygem-puma||Affected|
|SUSE Linux Enterprise High Availability Extension 15 SP1||rubygem-puma||Affected|
|SUSE Linux Enterprise High Availability Extension 15 SP2||rubygem-puma||Affected|
|SUSE Linux Enterprise High Availability Extension 15 SP3||rubygem-puma||Affected|
|SUSE Linux Enterprise High Availability Extension 15 SP4||rubygem-puma||Affected|
|SUSE OpenStack Cloud Crowbar 8||rubygem-puma||Released|
|SUSE OpenStack Cloud Crowbar 9||rubygem-puma||Released|