CVE-2019-17638: Jetty server Remote Code Execution Vulnerability

Q: What is CVE-2019-17638?

CVE-2019-17638 is a security vulnerability in Jetty server involving Operation on a Resource after Expiration or Release in Jetty Server under CWE-672: Operation on a Resource after Expiration or Release.

Q: Which Jetty server versions are affected?

Affected versions include releases prior to 9.4.30.v20200611 across affected packages: org.eclipse.jetty:jetty-server.

Q: What version fixes CVE-2019-17638?

Upgrading to 9.4.30.v20200611 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is jetty-server affected?

Yes, org.eclipse.jetty:jetty-server is affected in releases prior to 9.4.30.v20200611. Upgrade your dependency to 9.4.30.v20200611 or later.

Q: What is the CVSS score of CVE-2019-17638?

CVE-2019-17638 has a CVSS v3.1 base score of 9.4 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

Q: What CWE is associated with CVE-2019-17638?

CVE-2019-17638 is classified under CWE-672: Operation on a Resource after Expiration or Release (The product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.).

Q: How can I check Maven dependencies for CVE-2019-17638?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.eclipse.jetty'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

CRITICAL

Advisory Identifier: GHSA-x3rh-m7vp-35f2

CVSS 9.4

CWE-672 CWE-675

Published 2020-08-05

Advisory Summary

CVE-2019-17638 is a CRITICAL (CVSS 9.4) remote code execution vulnerability (CWE-672: Operation on a Resource after Expiration or Release) affecting Jetty server libraries in the Maven ecosystem. The issue involves operation on a resource after expiration or release in jetty server. Remediation is available by upgrading affected packages to version 9.4.30.v20200611.

CVE-2019-17638 at a Glance

CVE Identifier CVE-2019-17638

GHSA Identifier GHSA-x3rh-m7vp-35f2

Severity CRITICAL

CVSS v3.1 Base Score 9.4

CWE Classification CWE-672: Operation on a Resource after Expiration or Release

Affected Product Jetty server

Package Ecosystem Maven

Published Date 2020-08-05

Last Updated 2021-06-15

Security Impact

CVSS: 9.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability Low (A:L)

How to Fix CVE-2019-17638

To remediate this vulnerability, upgrade all affected Jetty server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.eclipse.jetty:jetty-server fixed: 9.4.30.v20200611

<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-server</artifactId>
    <version>9.4.30.v20200611</version>
</dependency>

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

mvn dependency:tree -Dincludes=org.eclipse.jetty

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2019-17638, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.eclipse.jetty

Analyze the terminal output to locate any version of Jetty server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.4.30.v20200611), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.eclipse.jetty command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-672: Operation on a Resource after Expiration or Release, where the product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked. In Jetty server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In Eclipse Jetty, versions 9.4.27.v20200227 to 9.4.29.v20200521, in case of too large response headers, Jetty throws an exception to produce an HTTP 431 error. When this happens, the ByteBuffer containing the HTTP response headers is released back to the ByteBufferPool twice. Because of this double release, two threads can acquire the same ByteBuffer from the pool and while thread1 is about to use the ByteBuffer to write response1 data, thread2 fills the ByteBuffer with response2 data. Thread1 then proceeds to write the buffer that now contains response2 data. This results in client1, which issued request1 and expects responses, to see response2 which could contain sensitive data belonging to client2 (HTTP session ids, authentication credentials, etc.).

CVE-2019-17638 Affected Jetty server Versions

1 component(s)

Fixed Versions:

9.4.30.v20200611

Product / Package	Ecosystem	Affected Versions	Fixed Version
org.eclipse.jetty:jetty-server maven/org.eclipse.jetty/jetty-server	Maven	≥ 9.4.27 < 9.4.30.v20200611	9.4.30.v20200611

References

NVD — CVE-2019-17638 NVD

https://nvd.nist.gov/vuln/detail/CVE-2019-17638

Jetty server Source Repository REPOSITORY

https://github.com/eclipse/jetty.project/issues/4936

Security Fix Commit FIX COMMIT

https://github.com/eclipse/jetty.project/commit/ff8ae56fa939c3477a0cdd1ff56ce3d902f08fba

Jetty server Security Information SECURITY

https://www.oracle.com/security-alerts/cpuoct2020.html

Jetty server Security Information SECURITY

https://www.oracle.com/security-alerts/cpuApr2021.html

snyk.io/vuln/snyk-java-orge... WEB

https://snyk.io/vuln/SNYK-JAVA-ORGECLIPSEJETTY-575561

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XE6US6VPZHOWFMUSFGDS5V2DNQPY5MKB

lists.apache.org/thread.html/rd98cfd... WEB

https://lists.apache.org/thread.html/rd98cfd012490cb02caa1a11aaa0cc38bff2d43bcce9b20c2f01063dd@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/rd0e44e... WEB

https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/rbe1f23... WEB

https://lists.apache.org/thread.html/rbe1f230e87ea947593145d0072d0097ddb0af10fee1161db8ca1546c@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/ra8661f... WEB

https://lists.apache.org/thread.html/ra8661fc8c69c647cb06153c1485d48484a833d873f75dfe45937e9de@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r9a2cfa... WEB

https://lists.apache.org/thread.html/r9a2cfa56d30782a0c17a5deb951a622d1f5c8de48e1c3b578ffc2a84@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r9584c4... WEB

https://lists.apache.org/thread.html/r9584c4304c888f651d214341a939bd264ed30c9e3d0d30fe85097ecf@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r81f585... WEB

https://lists.apache.org/thread.html/r81f58591fb4716fb867b36956f30c7c8ad4ab3f23abc952d9d86a2a0@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r7fc5f2... WEB

https://lists.apache.org/thread.html/r7fc5f2ed49641ea91c433e3cd0fc3d31c0278c87b82b15c33b881415@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r521168... WEB

https://lists.apache.org/thread.html/r521168299e023fb075b57afe33d17ff1d09e8a10e0fd8c775ea0e028@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r4bdd3f... WEB

https://lists.apache.org/thread.html/r4bdd3f7bb6820a79f9416b6667d718a06d269018619a75ce4b759318@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r378e4c... WEB

https://lists.apache.org/thread.html/r378e4cdec15e132575aa1dcb6296ffeff2a896745a8991522e266ad4@%3Ccommits.pulsar.apache.org%3E

lists.apache.org/thread.html/r290739... WEB

https://lists.apache.org/thread.html/r29073905dc9139d0d7a146595694bf57bb9e35e5ec6aa73eb9c8443a@%3Ccommits.pulsar.apache.org%3E

bugs.eclipse.org/bugs/show_bug.cgi WEB

https://bugs.eclipse.org/bugs/show_bug.cgi?id=564984

Jetty server Security Information SECURITY

http://www.openwall.com/lists/oss-security/2020/08/17/1

Frequently Asked Questions

What is CVE-2019-17638?

CVE-2019-17638 is a security vulnerability in Jetty server involving Operation on a Resource after Expiration or Release in Jetty Server under CWE-672: Operation on a Resource after Expiration or Release.

Which Jetty server versions are affected?

Affected versions include releases prior to 9.4.30.v20200611 across affected packages: org.eclipse.jetty:jetty-server.

What version fixes CVE-2019-17638?

Upgrading to 9.4.30.v20200611 (or the latest patched release for your respective branch) resolves the vulnerability.

Is jetty-server affected?

Yes, org.eclipse.jetty:jetty-server is affected in releases prior to 9.4.30.v20200611. Upgrade your dependency to 9.4.30.v20200611 or later.

What is the CVSS score of CVE-2019-17638?

CVE-2019-17638 has a CVSS v3.1 base score of 9.4 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

What CWE is associated with CVE-2019-17638?

CVE-2019-17638 is classified under CWE-672: Operation on a Resource after Expiration or Release (The product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.).

How can I check Maven dependencies for CVE-2019-17638?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.eclipse.jetty'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

Machine-readable OSV JSON OSV v1.5 Schema

Normalized schema output

View Raw JSON

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  "id" : "GHSA-x3rh-m7vp-35f2",
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  "published" : "2020-08-05T14:52:59Z",
  "aliases" : [ "CVE-2019-17638" ],
  "summary" : "Operation on a Resource after Expiration or Release in Jetty Server",
  "details" : "In Eclipse Jetty, versions 9.4.27.v20200227 to 9.4.29.v20200521, in case of too large response headers, Jetty throws an exception to produce an HTTP 431 error. When this happens, the ByteBuffer containing the HTTP response headers is released back to the ByteBufferPool twice. Because of this double release, two threads can acquire the same ByteBuffer from the pool and while thread1 is about to use the ByteBuffer to write response1 data, thread2 fills the ByteBuffer with response2 data. Thread1 then proceeds to write the buffer that now contains response2 data. This results in client1, which issued request1 and expects responses, to see response2 which could contain sensitive data belonging to client2 (HTTP session ids, authentication credentials, etc.).",
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    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-03T20:11:29Z",
    "nvd_published_at" : "2020-07-09T18:15:00Z"
  }
}

CVSS V3

9.4 CRITICAL

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability Low (A:L)

Vector String

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

Advisory Metadata

Source ID: GHSA-x3rh-m7vp-35f2
Schema Version: 1.4.0
Published: 2020-08-05 14:52
Last Modified: 2021-06-15 18:11
Database Record File: advisories/github-reviewed/2020/08/GHSA-x3rh-m7vp-35f2/GHSA-x3rh-m7vp-35f2.json