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Fencer Intel
medium 5.9

CVE-2020-35510 json

Uncontrolled Resource Consumption in jboss-remoting

published 5y ago modified 4mo ago also GHSA-p6j8-hgv5-m35g , EUVD-2022-1490

cvss
5.9
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

A flaw was found in jboss-remoting in versions before 5.0.20.SP1-redhat-00001. A malicious attacker could cause threads to hold up forever in the EJB server by writing a sequence of bytes corresponding to the expected messages of a successful EJB client request, but omitting the ACK messages, or just tamper with jboss-remoting code, deleting the lines that send the ACK message from the EJB client code resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Patch / fix

  • maven org.jboss.remoting:jboss-remoting 5.0.20.Final
  • redhat jboss-remoting 5.0.20
  • eap7-guava jboss enterprise application platform 7.3 30.1.0-1.redhat_00001.1.el7eap
  • eap7-wildfly jboss enterprise application platform 7.3 7.3.6-1.GA_redhat_00002.1.el7eap
  • eap7-narayana jboss enterprise application platform 7.3 5.9.11-1.Final_redhat_00001.1.el7eap
  • eap7-undertow jboss enterprise application platform 7.3 2.0.34-1.SP1_redhat_00001.1.el7eap
  • eap7-hal-console jboss enterprise application platform 7.3 3.2.13-1.Final_redhat_00001.1.el7eap
  • eap7-ironjacamar jboss enterprise application platform 7.3 1.4.27-1.Final_redhat_00001.1.el7eap
  • eap7-bouncycastle jboss enterprise application platform 7.3 1.68.0-1.redhat_00001.1.el7eap
  • eap7-jboss-remoting jboss enterprise application platform 7.3 5.0.20-2.SP1_redhat_00001.1.el7eap

red hat advisories RHSA-2021:0873RHSA-2021:0874RHSA-2021:0872

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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-2020-35510 updated cvss 5.9

jboss-remoting: Threads hold up forever in the EJB server by suppressing the ack from an EJB client

  • Red Hat Decision Manager 7 jboss-remoting
    affected: no fix available
  • Red Hat JBoss BRMS 5 jboss-remoting Red Hat JBoss Data Grid 7 jboss-remoting Red Hat JBoss Data Virtualization 6 jboss-remoting Red Hat JBoss Enterprise Application Platform 5 jboss-remoting Red Hat JBoss Enterprise Application Platform 6 jboss-remoting
    affected: no fix planned “Out of support scope”
  • Red Hat JBoss Enterprise Application Platform Expansion Pack jboss-remoting
    affected: no fix available
  • Red Hat JBoss Fuse 6 jboss-remoting Red Hat JBoss Fuse Service Works 6 jboss-remoting Red Hat JBoss Operations Network 3 jboss-remoting Red Hat JBoss SOA Platform 5 jboss-remoting
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Application Runtimes jboss-remoting Red Hat Process Automation 7 jboss-remoting
    affected: no fix available
  • Red Hat EAP-XP via EAP 7.3.x base
    fixed: vendor fix RHSA-2021:2210
  • Red Hat Fuse 7.10
    fixed: vendor fix RHSA-2021:5134
  • Red Hat JBoss EAP 7.3 for BaseOS-8 eap7-guava 30.1.0-1.redhat_00001.1.el8eap, eap7-wildfly 7.3.6-1.GA_redhat_00002.1.el8eap, eap7-bouncycastle 1.68.0-1.redhat_00001.1.el8eap, eap7-undertow 2.0.34-1.SP1_redhat_00001.1.el8eap, eap7-narayana 5.9.11-1.Final_redhat_00001.1.el8eap, eap7-activemq-artemis 2.9.0-9.redhat_00019.1.el8eap, +75 more
    fixed: vendor fix RHSA-2021:0874
show 4 more
  • Red Hat JBoss EAP 7.3 for RHEL 6 Server eap7-guava 30.1.0-1.redhat_00001.1.el6eap, eap7-wildfly 7.3.6-1.GA_redhat_00002.1.el6eap, eap7-bouncycastle 1.68.0-1.redhat_00001.1.el6eap, eap7-undertow 2.0.34-1.SP1_redhat_00001.1.el6eap, eap7-narayana 5.9.11-1.Final_redhat_00001.1.el6eap, eap7-activemq-artemis 2.9.0-9.redhat_00019.1.el6eap, +75 more
    fixed: vendor fix RHSA-2021:0872
  • Red Hat JBoss EAP 7.3 for RHEL 7 Server eap7-guava 30.1.0-1.redhat_00001.1.el7eap, eap7-wildfly 7.3.6-1.GA_redhat_00002.1.el7eap, eap7-bouncycastle 1.68.0-1.redhat_00001.1.el7eap, eap7-undertow 2.0.34-1.SP1_redhat_00001.1.el7eap, eap7-narayana 5.9.11-1.Final_redhat_00001.1.el7eap, eap7-activemq-artemis 2.9.0-9.redhat_00019.1.el7eap, +77 more
    fixed: vendor fix RHSA-2021:0873
  • Red Hat JBoss Enterprise Application Platform 7
    fixed: vendor fix RHSA-2021:0885
  • Red Hat Single Sign-On 7.4.6
    fixed: vendor fix RHSA-2021:0974

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

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.jboss.remoting:jboss-remoting
<5.0.20.Final
5.0.20.Final

Affected products

  • n/a jboss-remoting

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel 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.