GHSA-86wm-rrjm-8wh8

Buffer not correctly recycled in Gzip Request inflation

Source: GitHub Advisory Database (reviewed) Moderate CVE-2020-27218

Packages

Ecosystem	Package	Affected	Fixed in
Maven	org.eclipse.jetty:jetty-server	>= 9.4.0, < 9.4.35.v20201120	9.4.35.v20201120

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact If GZIP request body inflation is enabled and requests from different clients are multiplexed onto a single connection and if an attacker can send a request with a body that is received entirely by not consumed by the application, then a subsequent request on the same connection will see that body prepended to it's body. The attacker will not see any data, but may inject data into the body of the subsequent request CVE score is [4.8 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L](https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L&version=3.1) ### Workarounds The problem can be worked around by either: - Disabling compressed request body inflation by GzipHandler. - By always fully consuming the request content before sending a response. - By adding a `Connection: close` to any response where the servlet does not fully consume request content.

References

External links from the advisory. They lead to third-party sites.