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Fencer Vulns
medium 4.8

CVE-2020-27218 json

Buffer not correctly recycled in Gzip Request inflation

published 2020-11-28 5 y ago modified 2026-09-08 2 mo ago also BIT-kafka-2020-27218 , BIT-spark-2020-27218 , EUVD-2020-1488 , GHSA-86wm-rrjm-8wh8

cvss
4.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.3%
EPSS 8.3% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.eclipse.jetty:jetty-server 9.4.35.v20201120
  • bitnami kafka 2.7.1
  • bitnami spark 2.4.9, 3.0.4
  • eclipse jetty 9.4.35
  • oracle blockchain_platform 21.1.2
  • oracle rest_data_services 20.4.3.050.1904
  • jetty9 Debian 14, Debian 13, Debian 12 9.4.35-1

debian advisories DEBIAN-CVE-2020-27218

  • jenkins openshift 4.5 2.277.3.1623846768-1.el7
  • jenkins-2-plugins openshift 4.5 4.5.1623326336-1.el7
  • jenkins openshift 3.11 2.289.1.1624365627-1.el7
  • jenkins-2-plugins openshift 3.11 3.11.1624366838-1.el7
  • jenkins openshift 4.6 2.277.3.1623853726-1.el8

red hat advisories RHSA-2021:2431RHSA-2021:2517RHSA-2021:2499

  • jetty-minimal SLE Module for Development Tools 15 SP2 9.4.35-3.3.4

suse advisories SUSE-SU-2020:3922-1

  • jetty-minimal openSUSE Leap 15.2 9.4.35-lp152.2.3.1
  • jetty-websocket openSUSE Leap 15.2 9.4.35-lp152.2.3.1

opensuse advisories openSUSE-SU-2021:0012-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-27218 updated cvss 4.8

jetty: buffer not correctly recycled in Gzip Request inflation

  • Red Hat Enterprise Linux 8 jetty-io, jetty-http, jetty-util, jetty-server, jetty-servlet, jetty-security, +1 more
    affected: no fix planned “Will not fix”
  • Red Hat Integration Camel Quarkus 1 jetty
    affected: no fix available
  • Red Hat JBoss A-MQ 6 jetty Red Hat JBoss Fuse 6 jetty Red Hat JBoss Fuse Service Works 6 jetty
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4 openshift4/ose-metering-hive, openshift4/ose-metering-hadoop, openshift4/ose-metering-presto
    affected: no fix planned “Will not fix”
  • Red Hat AMQ 7.8.1
    fixed: vendor fix RHSA-2021:0417
  • Red Hat AMQ LTS 7.4.6
    fixed: vendor fix RHSA-2021:0329
  • Red Hat Fuse 7.10
    fixed: vendor fix RHSA-2021:5134
  • Red Hat Integration Camel Quarkus 2
    fixed: vendor fix RHSA-2021:4767
show 6 more
  • Red Hat Migration Toolkit 1.4 rhmtc/openshift-migration-ui-rhel8 v1.4.6-4, rhmtc/openshift-velero-plugin-rhel8 v1.4.6-4, rhmtc/openshift-migration-velero-rhel8 v1.4.6-5, rhmtc/openshift-migration-registry-rhel8 v1.4.6-4, rhmtc/openshift-migration-operator-bundle v1.4.6-5, rhmtc/openshift-migration-controller-rhel8 v1.4.6-4, +7 more
    fixed: vendor fix RHBA-2021:2854
  • Red Hat OpenShift Container Platform 3.11 jenkins 2.289.1.1624365627-1.el7
    fixed: vendor fix RHSA-2021:2517
  • Red Hat OpenShift Container Platform 4.5 jenkins 2.277.3.1623846768-1.el7
    fixed: vendor fix RHSA-2021:2431
  • Red Hat OpenShift Container Platform 4.6 jenkins 2.277.3.1623853726-1.el8
    fixed: vendor fix RHSA-2021:2499
  • Red Hat RHINT Camel-K 1.6.4
    fixed: vendor fix RHSA-2022:1029
  • Red Hat Decision Manager 7 jetty Red Hat Enterprise Linux 6 jetty-eclipse Red Hat Enterprise Linux 7 jetty-io, jetty-ant, jetty-jmx, jetty-jsp, jetty-xml, jetty-http, +30 more Red Hat OpenShift Container Platform 3.11 python-requests 2.19.1-5.el7, python2-requests 2.19.1-5.el7, prometheus 3.11.462-1.git.99aae51.el7, jenkins-2-plugins 3.11.1624366838-1.el7, openshift-kuryr 3.11.462-1.git.c33a657.el7, atomic-openshift 3.11.462-1.git.0.e7d0362.el7, +37 more Red Hat OpenShift Container Platform 4.5 jenkins-2-plugins 4.5.1623326336-1.el7, openshift 4.5.0-202106011407.p0.git.d8ef5ad.el7, openshift 4.5.0-202106011407.p0.git.d8ef5ad.el8, openshift-kuryr 4.5.0-202106011407.p0.git.75cc301.el8, openshift-ansible 4.5.0-202106011407.p0.git.83db419.el7, openshift-clients 4.5.0-202106011407.p0.git.297a4ac.el7, +12 more Red Hat OpenShift Container Platform 4.6 cri-o 1.19.2-6.rhaos4.6.git686e6d9.el7, cri-o 1.19.2-6.rhaos4.6.git686e6d9.el8, openshift-kuryr 4.6.0-202106181055.p0.git.7feb5bd.el8, openshift-clients 4.6.0-202106160917.p0.git.99556b6.el7, openshift-clients 4.6.0-202106160917.p0.git.99556b6.el8, openshift-kuryr-cni 4.6.0-202106181055.p0.git.7feb5bd.el8, +5 more
    +2 more products
    Red Hat Process Automation 7 jetty Red Hat Single Sign-On 7 jetty
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

8.28% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P
OSV 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected packages

ecosystem package affected fixed in
maven org.eclipse.jetty:jetty-server
>=9.4.0, <9.4.35.v20201120
9.4.35.v20201120
bitnami kafka
>=2.7.0, <2.7.1
2.7.1
bitnami spark
>=2.4.8, <2.4.9
>=3.0.3, <3.0.4
2.4.9
3.0.4

Affected products

  • The Eclipse Foundation Eclipse Jetty

Classification

Weakness
  • CWE-226 Sensitive Information in Resource Not Removed Before Reuse

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.