Lucene search
K
Database
Vendors
Products
Years
CVSS
Scanner
Agent Scanning
API Scanning
Manual Audit
Perimeter Scanner
Scanning
Projects
Email
Webhook
Plugins
Resources
Documents
Blog
Glossary
FAQ
Pricing
Contacts
About Us
Partners
Branding Guideline
githubGitHub Advisory DatabaseGHSA-26VR-8J45-3R4W
HistoryApr 06, 2021 - 5:31 p.m.

Jetty vulnerable to incorrect handling of invalid large TLS frame, exhausting CPU resources

2021-04-0617:31:30
CWE-400
CWE-551
CWE-755
GitHub Advisory Database
github.com
62

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.802 High

EPSS

Percentile

98.3%

JSON

Impact

When using SSL/TLS with Jetty, either with HTTP/1.1, HTTP/2, or WebSocket, the server may receive an invalid large (greater than 17408) TLS frame that is incorrectly handled, causing CPU resources to eventually reach 100% usage.

Workarounds

The problem can be worked around by compiling the following class:

package org.eclipse.jetty.server.ssl.fix6072;

import java.nio.ByteBuffer;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLEngineResult;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLHandshakeException;

import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.io.ssl.SslConnection;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.SslConnectionFactory;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.annotation.Name;
import org.eclipse.jetty.util.ssl.SslContextFactory;

public class SpaceCheckingSslConnectionFactory extends SslConnectionFactory
{
    public SpaceCheckingSslConnectionFactory(@Name("sslContextFactory") SslContextFactory factory, @Name("next") String nextProtocol)
    {
        super(factory, nextProtocol);
    }

    @Override
    protected SslConnection newSslConnection(Connector connector, EndPoint endPoint, SSLEngine engine)
    {
        return new SslConnection(connector.getByteBufferPool(), connector.getExecutor(), endPoint, engine, isDirectBuffersForEncryption(), isDirectBuffersForDecryption())
        {
            @Override
            protected SSLEngineResult unwrap(SSLEngine sslEngine, ByteBuffer input, ByteBuffer output) throws SSLException
            {
                SSLEngineResult results = super.unwrap(sslEngine, input, output);

                if ((results.getStatus() == SSLEngineResult.Status.BUFFER_UNDERFLOW ||
                    results.getStatus() == SSLEngineResult.Status.OK && results.bytesConsumed() == 0 && results.bytesProduced() == 0) &&
                    BufferUtil.space(input) == 0)
                {
                    BufferUtil.clear(input);
                    throw new SSLHandshakeException("Encrypted buffer max length exceeded");
                }
                return results;
            }
        };
    }
}

This class can be deployed by:

  • The resulting class file should be put into a jar file (eg sslfix6072.jar)
  • The jar file should be made available to the server. For a normal distribution this can be done by putting the file into ${jetty.base}/lib
  • Copy the file ${jetty.home}/modules/ssl.mod to ${jetty.base}/modules
  • Edit the ${jetty.base}/modules/ssl.mod file to have the following section:
[lib]
lib/sslfix6072.jar
  • Copy the file ${jetty.home}/etc/jetty-https.xml and${jetty.home}/etc/jetty-http2.xml to ${jetty.base}/etc
  • Edit files ${jetty.base}/etc/jetty-https.xml and ${jetty.base}/etc/jetty-http2.xml, changing any reference of org.eclipse.jetty.server.SslConnectionFactory to org.eclipse.jetty.server.ssl.fix6072.SpaceCheckingSslConnectionFactory. For example:
  <Call name="addIfAbsentConnectionFactory">
    <Arg>
      <New class="org.eclipse.jetty.server.ssl.fix6072.SpaceCheckingSslConnectionFactory">
        <Arg name="next">http/1.1</Arg>
        <Arg name="sslContextFactory"><Ref refid="sslContextFactory"/></Arg>
      </New>
    </Arg>
  </Call>
  • Restart Jetty

References

Related

cve 1
ibm 28
prion 1
nessus 10
f5 1
freebsd 1
osv 4
veracode 1
debiancve 1
atlassian 1
githubexploit 1
redhatcve 1
ubuntucve 1
redhat 12
suse 1
oracle 4
cve
cve
CVE-2021-28165
2021-04-01 15:15:00
ibm
ibm
Security Bulletin: Vulnerability found in Eclipse Jetty may affect IBM Enterprise Records
2022-10-20 11:29:10
Security Bulletin: Vulnerability in Eclipse Jetty affects IBM Process Mining (CVE-2021-28165)
2023-02-01 21:57:21
Security Bulletin: CVE-2021-28165 In Eclipse Jetty CPU usage can reach 100% upon receiving a large invalid TLS frame.
2021-07-30 05:02:26
prion
prion
Design/Logic Flaw
2021-04-01 15:15:00
nessus
nessus
Jenkins Enterprise and Operations Center < 2.249.31.0.1 / 2.277.3.1 DoS (CloudBees Security Advisory 2021-04-20)
2021-11-18 00:00:00
FreeBSD : jenkins -- Denial of service vulnerability in bundled Jetty (e358b470-b37d-4e47-bc8a-2cd9adbeb63c)
2021-04-21 00:00:00
Jenkins LTS < 2.277.3 / Jenkins weekly < 2.286
2021-04-23 00:00:00
f5
f5
K15338344 : Eclipse Jetty vulnerability CVE-2021-28165
2021-10-15 00:00:00
freebsd
freebsd
jenkins -- Denial of service vulnerability in bundled Jetty
2021-04-20 00:00:00
osv
osv
BIT-jenkins-2021-28165
2024-03-06 10:58:50
CVE-2021-28165
2021-04-01 15:15:14
Jetty vulnerable to incorrect handling of invalid large TLS frame, exhausting CPU resources
2021-04-06 17:31:30
veracode
veracode
Denial Of Service (DoS)
2021-04-07 05:52:43
debiancve
debiancve
CVE-2021-28165
2021-04-01 15:15:00
atlassian
atlassian
DoS (Denial of Service) org.eclipse.jetty:jetty-io in Jira Software Data Center and Server
2023-09-26 16:17:04
githubexploit
githubexploit
Exploit for Improper Handling of Exceptional Conditions in Eclipse Jetty
2023-10-31 10:39:28
redhatcve
redhatcve
CVE-2021-28165
2021-04-01 18:17:35
ubuntucve
ubuntucve
CVE-2021-28165
2021-04-01 00:00:00
redhat
redhat
(RHSA-2021:1560) Moderate: Red Hat AMQ Streams 1.6.4 release and security update
2021-05-13 15:12:11
(RHSA-2021:1509) Moderate: rh-eclipse-jetty security update
2021-05-05 13:15:00
(RHSA-2021:1551) Moderate: OpenShift Container Platform 4.7.11 security and bug fix update
2021-05-19 14:41:36
suse
suse
Security update for jetty-minimal (important)
2021-07-11 00:00:00
oracle
oracle
Oracle Critical Patch Update Advisory - October 2023
2023-10-17 00:00:00
Oracle Critical Patch Update Advisory - October 2022
2022-10-18 00:00:00
Oracle Critical Patch Update Advisory - October 2021
2021-10-19 00:00:00

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.802 High

EPSS

Percentile

98.3%

JSON
Related for GHSA-26VR-8J45-3R4W
cve1ibm28prion1nessus10f51freebsd1osv4veracode1debiancve1atlassian1githubexploit1redhatcve1ubuntucve1redhat12suse1oracle4