CVE-2020-27218

Description

In Eclipse Jetty version 9.4.0.RC0 to 9.4.34.v20201102, 10.0.0.alpha0 to 10.0.0.beta2, and 11.0.0.alpha0 to 11.0.0.beta2, 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 but not consumed by the application, then a subsequent request on the same connection will see that body prepended to its body. The attacker will not see any data but may inject data into the body of the subsequent request.

How to fix CVE-2020-27218

To remediate CVE-2020-27218, upgrade the affected package to a fixed version below.

• —upgrade to 2.7.1 or later
• —upgrade to 2.4.9 or later
• —upgrade to 9.4.35-1 or later
• —upgrade to 9.4.50-4+deb10u1 or later
• —upgrade to 9.4.35.v20201120 or later

Is CVE-2020-27218 being exploited?

Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.

Affected packages (5)

• >= 2.7.0, < 2.7.1
• >= 2.4.8, < 2.4.9, >= 3.0.3, < 3.0.4
• from 0, < 9.4.35-1
• from 0, < 9.4.50-4+deb10u1
• >= 9.4.0, < 9.4.35.v20201120

CVSS scores

References (230)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-27218
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2020-27218
• PATCHgithub.com/eclipse/jetty.project
• WEBbugs.eclipse.org/bugs/show_bug.cgi?id=568892
• WEB